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Average temperature change in every state over the past 100 years

Average temperature change in every state over the past 100 years
1/Canva

Average temperature change in every state over the past 100 years

The climate is changing, and nothing will be spared from its effects: No acre of nature, no human, and no animal is completely insulated from the changes that will take place over the next century. A larger and larger share of the electorate, now a majority at 51% according to a 2018 poll, believe that climate change is very important for the U.S. to address.

With increasing extreme weather events, climate change has become impossible to ignore. Just in the past year, for example, entire Californian towns were leveled by wildfires, the Midwest faced lethal flooding, and Hurricane Florence devastated the Carolinas. These weather disasters weren’t directly caused by a warming climate, but it made them worse, and their devastation is a troubling sign of what’s to come. From the future property values of potential purchases to the safety of your loved ones, it’s important to understand the effects the warming climate will have on the United States.

Climate change won’t affect every area equally, and that’s true between different states. But 27 out of 40 states had their hottest summers after 2000, and 32 out of 49 states had their hottest overall years after 2000 (data for Hawaii wasn’t available). Every state had a positive average temperature change (i.e., the state is getting warmer) except for Alabama, Mississippi, and Arkansas. Though the amount of warming, a few degrees at most, seems inconsequential, it’s important to know that past ice ages were caused by just a few degrees of cooling. At the track humans are on, the warming of Earth will have devastating worldwide effects without significant international efforts to stop it.

Stacker used July 2019 data from the National Oceanic and Atmospheric Administration’s National Centers for Environmental Information to detail the temperature change over the last century in every U.S. state, save Hawaii. Read on to find out where your state ranks, along with what year the hottest summer and coldest winter occurred. Winter in this story refers to December of the preceding year through February of the current year (e.g., in 1919, winter is December 1918 to February 1919), while summer refers to June through August of each year. Long-range temperature data for Hawaii were not available, and data for Alaska reflect the years 1925 through 2018.

You mean also like: Why does lightning strike? And answers to 50 other weather questions

Alabama: -0.3° F per century
2/Pixabay

Alabama: -0.3° F per century

- Highest annual temperature: 65.7° F (1921; 4% above 100-year average)
- Lowest annual temperature: 60.7° F (1976; 3.9% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 82.2° F; 0.4% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 39.7° F; -15.1% below 100-year average)

 

Alaska: 3° F per century
3/Pixabay

Alaska: 3° F per century

- Highest annual temperature: 31.9° F (2016; 20.7% above 100-year average)
- Lowest annual temperature: 21.8° F (1956; 17.5% below 100-year average)
- Hottest summer: 2004 (Three-month average temperature: 55.9° F; 0.9% above 100-year average)
- Coldest winter: 1965 (Three-month average temperature: -5° F; -215.2% below 100-year average)

 

Arizona: 2.7° F per century
4/Creative Commons // Wikipedia

Arizona: 2.7° F per century

- Highest annual temperature: 63° F (2017; 5.4% above 100-year average)
- Lowest annual temperature: 57.8° F (1920; 3.3% below 100-year average)
- Hottest summer: 1994 (Three-month average temperature: 80.6° F; 0.4% above 100-year average)
- Coldest winter: 1933 (Three-month average temperature: 35.9° F; -15.8% below 100-year average)

Arkansas: 0° F per century
5/PxHere

Arkansas: 0° F per century

- Highest annual temperature: 63.6° F (2012; 4.9% above 100-year average)
- Lowest annual temperature: 58° F (1979; 4.3% below 100-year average)
- Hottest summer: 1934 (Three-month average temperature: 83.2° F; 0.5% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 33.9° F; -18.5% below 100-year average)

California: 2.4° F per century
6/Unsplash

California: 2.4° F per century

- Highest annual temperature: 61.4° F (2014; 6.1% above 100-year average)
- Lowest annual temperature: 55.6° F (1948; 3.9% below 100-year average)
- Hottest summer: 2017 (Three-month average temperature: 76.5° F; 0.5% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 36.8° F; -16.4% below 100-year average)

 

Colorado: 2.3° F per century
7/Unsplash

Colorado: 2.3° F per century

- Highest annual temperature: 48.3° F (2012; 7.2% above 100-year average)
- Lowest annual temperature: 42.5° F (1929; 5.7% below 100-year average)
- Hottest summer: 2012 (Three-month average temperature: 68.7° F; 0.5% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 19.5° F; -24.8% below 100-year average)

Connecticut: 2.6° F per century
8/John9474 // Wikimedia Commons

Connecticut: 2.6° F per century

- Highest annual temperature: 52.5° F (2012; 8% above 100-year average)
- Lowest annual temperature: 45.6° F (1926; 6.2% below 100-year average)
- Hottest summer: 2016 (Three-month average temperature: 71.8° F; 0.4% above 100-year average)
- Coldest winter: 1920 (Three-month average temperature: 21.1° F; -24.1% below 100-year average)

 

Delaware: 2.5° F per century
9/Dough4872 // Wikimedia Commons

Delaware: 2.5° F per century

- Highest annual temperature: 58.5° F (2012; 6.8% above 100-year average)
- Lowest annual temperature: 51.7° F (1940; 5.6% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 78.1° F; 0.5% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: 28.3° F; -20.0% below 100-year average)

Florida: 1.6° F per century
10/Pixabay

Florida: 1.6° F per century

- Highest annual temperature: 70.4° F (1919; 28.2% above 100-year average)
- Lowest annual temperature: 51.7° F (1940; 5.9% below 100-year average)
- Hottest summer: 1998 (Three-month average temperature: 83.5° F; 0.3% above 100-year average)
- Coldest winter: 1958 (Three-month average temperature: 52.8° F; -10.6% below 100-year average)

 

Georgia: 0.4° F per century
11/Pixabay

Georgia: 0.4° F per century

- Highest annual temperature: 65.8° F (2016; 3.5% above 100-year average)
- Lowest annual temperature: 61.5° F (1940; 3.2% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 81.8° F; 0.4% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 41.3° F; -13.5% below 100-year average)

 

Idaho: 1.9° F per century
12/Pixabay

Idaho: 1.9° F per century

- Highest annual temperature: 46.9° F (1934; 9.2% above 100-year average)
- Lowest annual temperature: 39.7° F (1985; 7.6% below 100-year average)
- Hottest summer: 1961 (Three-month average temperature: 66.1° F; 0.6% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 14.3° F; -41.7% below 100-year average)

 

Illinois: 0.8° F per century
13/Unsplash

Illinois: 0.8° F per century

- Highest annual temperature: 55.8° F (2012; 7.3% above 100-year average)
- Lowest annual temperature: 49.2° F (1924; 5.4% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 78.2° F; 0.6% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 19.5° F; -31.7% below 100-year average)

 

Indiana: 0.7° F per century
14/Pixabay

Indiana: 0.7° F per century

- Highest annual temperature: 55.8° F (2012; 7.3% above 100-year average)
- Lowest annual temperature: 49.2° F (1924; 5.4% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 76.5° F; 0.5% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 19.7° F; -32.8% below 100-year average)

 

Iowa: 0.6° F per century
15/Pixabay

Iowa: 0.6° F per century

- Highest annual temperature: 52.1° F (2012; 8.9% above 100-year average)
- Lowest annual temperature: 44.3° F (1951; 7.4% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 76.7° F; 0.7% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: 10.9° F; -49.7% below 100-year average)

 

Kansas: 0.9° F per century
16/Pixabay

Kansas: 0.9° F per century

- Highest annual temperature: 58.2° F (2012; 6.8% above 100-year average)
- Lowest annual temperature: 51.9° F (1924; 4.8% below 100-year average)
- Hottest summer: 1934 (Three-month average temperature: 83.2° F; 0.8% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 23.1° F; -27.5% below 100-year average)

 

Kentucky: 0.2° F per century
17/Good Free Photos

Kentucky: 0.2° F per century

- Highest annual temperature: 58.7° F (1921; 5.3% above 100-year average)
- Lowest annual temperature: 53° F (1958; 4.9% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 78.6° F; 0.5% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 26.5° F; -26.1% below 100-year average)

 

Louisiana: 0.3° F per century
18/Unsplash

Louisiana: 0.3° F per century

- Highest annual temperature: 68.9° F (1921; 3.5% above 100-year average)
- Lowest annual temperature: 64.3° F (1976; 3.4% below 100-year average)
- Hottest summer: 2011 (Three-month average temperature: 84.9° F; 0.4% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 44° F; -13.9% below 100-year average)

 

Maine: 2.5° F per century
19/Ken Lund // Flickr

Maine: 2.5° F per century

- Highest annual temperature: 44.6° F (2010; 9.7% above 100-year average)
- Lowest annual temperature: 37.1° F (1926; 8.8% below 100-year average)
- Hottest summer: 1937 (Three-month average temperature: 65.8° F; 0.4% above 100-year average)
- Coldest winter: 1935 (Three-month average temperature: 11.1° F; -33.6% below 100-year average)

 

Maryland: 1.8° F per century
20/Good Free Photos

Maryland: 1.8° F per century

- Highest annual temperature: 57.5° F (2012; 6% above 100-year average)
- Lowest annual temperature: 51.6° F (1940; 4.9% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 77.2° F; 0.5% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: 27.6° F; -20% below 100-year average)

 

Massachusetts: 2.5° F per century
21/Unsplash

Massachusetts: 2.5° F per century

- Highest annual temperature: 51.3° F (2012; 8% above 100-year average)
- Lowest annual temperature: 44.3° F (1926; 6.8% below 100-year average)
- Hottest summer: 1949 (Three-month average temperature: 70.8° F; 0.4% above 100-year average)
- Coldest winter: 1920 (Three-month average temperature: 20.3° F; -23.5% below 100-year average)

 

Michigan: 2.2° F per century
22/Bernt Rostad // Flickr

Michigan: 2.2° F per century

- Highest annual temperature: 48.4° F (2012; 9.7% above 100-year average)
- Lowest annual temperature: 40.8° F (1924; 7.5% below 100-year average)
- Hottest summer: 1955 (Three-month average temperature: 69.6° F; 0.5% above 100-year average)
- Coldest winter: 1920 (Three-month average temperature: 13.1° F; -37.7% below 100-year average)

 

Minnesota: 2.3° F per century
23/Pixabay

Minnesota: 2.3° F per century

- Highest annual temperature: 45.3° F (1987; 11.6% above 100-year average)
- Lowest annual temperature: 36.5° F (1950; 10.1% below 100-year average)
- Hottest summer: 1988 (Three-month average temperature: 70.7° F; 0.6% above 100-year average)
- Coldest winter: 2014 (Three-month average temperature: 3.7° F; -72.4% below 100-year average)

 

Mississippi: -0.2° F per century
24/Pixabay

Mississippi: -0.2° F per century

- Highest annual temperature: 66.4° F (1921; 4.2% above 100-year average)
- Lowest annual temperature: 61.4° F (1976; 3.7% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 82.9° F; 0.4% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 39.7° F; -15.5% below 100-year average)

 

Missouri: 0.4° F per century
25/Branson Convention and Visitors Bureau // Flickr

Missouri: 0.4° F per century

- Highest annual temperature: 66.4° F (1921; 4.3% above 100-year average)
- Lowest annual temperature: 54.7° F (1919; 14.1% below 100-year average)
- Hottest summer: 1934 (Three-month average temperature: 81.8° F; 0.8% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 24° F; -26.3% below 100-year average)

 

Montana: 2.1° F per century
26/Unsplash

Montana: 2.1° F per century

- Highest annual temperature: 44.9° F (1934; 8% above 100-year average)
- Lowest annual temperature: 37.4° F (1951; 10.1% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 67.7° F; 0.7% above 100-year average)
- Coldest winter: 1937 (Three-month average temperature: 11° F; -46.5% below 100-year average)

 

Nebraska: 1.2° F per century
27/Collinulness // Wikimedia Commons

Nebraska: 1.2° F per century

- Highest annual temperature: 52.7° F (2012; 8% above 100-year average)
- Lowest annual temperature: 45.5° F (1951; 6.7% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 77.5° F; 0.7% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 14.5° F; -42.8% below 100-year average)

 

Nevada: 2.2° F per century
28/Teo Romera // Flickr

Nevada: 2.2° F per century

- Highest annual temperature: 53° F (1934; 6.1% above 100-year average)
- Lowest annual temperature: 47.2° F (1944; 5.5% below 100-year average)
- Hottest summer: 2017 (Three-month average temperature: 72.8° F; 0.5% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 21.5° F; -33.2% below 100-year average)

 

New Hampshire: 2.4° F per century
29/Daderot // Wikimedia Commons

New Hampshire: 2.4° F per century

- Highest annual temperature: 46.6° F (2012; 8.6% above 100-year average)
- Lowest annual temperature: 39.3° F (1926; 8.4% below 100-year average)
- Hottest summer: 1949 (Three-month average temperature: 67.4° F; 0.4% above 100-year average)
- Coldest winter: 1934 (Three-month average temperature: 13.2° F; -33.8% below 100-year average)

 

New Jersey: 3° F per century
30/Alan Turkus // Flickr

New Jersey: 3° F per century

- Highest annual temperature: 55.9° F (2012; 7.3% above 100-year average)
- Lowest annual temperature: 48.9° F (1926; 6.1% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 75.7° F; 0.5% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: 25.2° F; -21.1% below 100-year average)

 

New Mexico: 2.1° F per century
31/Unsplash

New Mexico: 2.1° F per century

- Highest annual temperature: 56.4° F (2017; 5.9% above 100-year average)
- Lowest annual temperature: 51.4° F (1975; 3.5% below 100-year average)
- Hottest summer: 2011 (Three-month average temperature: 75.2° F; 0.5% above 100-year average)
- Coldest winter: 1919 (Three-month average temperature: 29.8° F; -16.3% below 100-year average)

 

New York: 1.9° F per century
32/Unsplash

New York: 1.9° F per century

- Highest annual temperature: 48.8° F (2012; 8.5% above 100-year average)
- Lowest annual temperature: 41.7° F (1926; 7.3% below 100-year average)
- Hottest summer: 2005 (Three-month average temperature: 70.1° F; 0.6% above 100-year average)
- Coldest winter: 1920 (Three-month average temperature: 15.5° F; -31% below 100-year average)

 

North Carolina: 0.6° F per century
33/Pixabay

North Carolina: 0.6° F per century

- Highest annual temperature: 61.1° F (1990; 3.9% above 100-year average)
- Lowest annual temperature: 56.7° F (1963; 3.6% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 78.9° F; 0.4% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 35.5° F; -14.6% below 100-year average)

 

North Dakota: 1.9° F per century
34/filedIMAGE // Shutterstock

North Dakota: 1.9° F per century

- Highest annual temperature: 45° F (1987; 11.9% above 100-year average)
- Lowest annual temperature: 34.9° F (1950; 13.2% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 72° F; 0.7% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: -3° F; -122.1% below 100-year average)

 

Ohio: 1.2° F per century
35/Phil Warren // Flickr

Ohio: 1.2° F per century

- Highest annual temperature: 54.1° F (1998; 6.6% above 100-year average)
- Lowest annual temperature: 48.1° F (1924; 5.3% below 100-year average)
- Hottest summer: 1934 (Three-month average temperature: 74.5° F; 0.5% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 20.4° F; -30.4% below 100-year average)

 

Oklahoma: 0.2° F per century
36/Unsplash

Oklahoma: 0.2° F per century

- Highest annual temperature: 63.2° F (2012; 5.5% above 100-year average)
- Lowest annual temperature: 57.4° F (1979; 4.2% below 100-year average)
- Hottest summer: 2011 (Three-month average temperature: 86.8° F; 0.8% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 31.3° F; -20.3% below 100-year average)

 

Oregon: 2.2° F per century
37/Unsplash

Oregon: 2.2° F per century

- Highest annual temperature: 50.4° F (2015; 7.4% above 100-year average)
- Lowest annual temperature: 44.3° F (1922; 5.6% below 100-year average)
- Hottest summer: 2015 (Three-month average temperature: 66.7° F; 0.6% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 24.2° F; -25.7% below 100-year average)

 

Pennsylvania: 1.4° F per century
38/Kevin Burkett // Flickr

Pennsylvania: 1.4° F per century

- Highest annual temperature: 51.8° F (1998; 6.8% above 100-year average)
- Lowest annual temperature: 46° F (1924; 5.2% below 100-year average)
- Hottest summer: 2005 (Three-month average temperature: 71.5° F; 0.4% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 20.5° F; -25.6% below 100-year average)

 

Rhode Island: 3.1° F per century
39/Will Hart // Wikimedia Commons

Rhode Island: 3.1° F per century

- Highest annual temperature: 52.9° F (2012; 7.5% above 100-year average)
- Lowest annual temperature: 45.9° F (1926; 6.8% below 100-year average)
- Hottest summer: 2018 (Three-month average temperature: 71.7° F; 0.4% above 100-year average)
- Coldest winter: 1920 (Three-month average temperature: 22.7° F; -22.9% below 100-year average)

 

South Carolina: 0.7° F per century
40/Pixabay

South Carolina: 0.7° F per century

- Highest annual temperature: 65.1° F (2017; 3.9% above 100-year average)
- Lowest annual temperature: 60.7° F (1958; 3.1% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 81.9° F; 0.4% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 40.1° F; -13.1% below 100-year average)

 

South Dakota: 1.5° F per century
41/Hasselblad500CM // Wikimedia Commons

South Dakota: 1.5° F per century

- Highest annual temperature: 49.3° F (2012; 9.5% above 100-year average)
- Lowest annual temperature: 40.9° F (1950; 9.1% below 100-year average)
- Hottest summer: 1936 (Three-month average temperature: 76.4° F; 0.8% above 100-year average)
- Coldest winter: 1937 (Three-month average temperature: 11.4° F; -41.2% below 100-year average)

 

Tennessee: 0.1° F per century
42/Unsplash

Tennessee: 0.1° F per century

- Highest annual temperature: 60.6° F (1921; 4.7% above 100-year average)
- Lowest annual temperature: 55.5° F (1976; 4.1% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 79.3° F; 0.4% above 100-year average)
- Coldest winter: 1978 (Three-month average temperature: 31° F; -20.9% below 100-year average)

 

Texas: 1.2° F per century
43/Unsplash

Texas: 1.2° F per century

- Highest annual temperature: 67.8° F (2012; 4.4% above 100-year average)
- Lowest annual temperature: 62.8° F (1976; 3.3% below 100-year average)
- Hottest summer: 2011 (Three-month average temperature: 86.8° F; 0.6% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 42.8° F; -10.1% below 100-year average)

 

Utah: 2.4° F per century
44/Raffi Asdourian // Flickr

Utah: 2.4° F per century

- Highest annual temperature: 51.3° F (1934; 6.8% above 100-year average)
- Lowest annual temperature: 45.7° F (1975; 4.9% below 100-year average)
- Hottest summer: 2018 (Three-month average temperature: 72.6° F; 0.5% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 18.9° F; -32.5% below 100-year average)

 

Vermont: 2.4° F per century
45/Pixabay

Vermont: 2.4° F per century

- Highest annual temperature: 45.8° F (2012; 9.3% above 100-year average)
- Lowest annual temperature: 38.2° F (1926; 8.8% below 100-year average)
- Hottest summer: 2005 (Three-month average temperature: 67.4° F; 0.5% above 100-year average)
- Coldest winter: 1934 (Three-month average temperature: 11° F; -39.6% below 100-year average)

 

Virginia: 1° F per century
46/gargola87 // Wikimedia Commons

Virginia: 1° F per century

- Highest annual temperature: 57.6° F (2012; 4.4% above 100-year average)
- Lowest annual temperature: 53° F (1940; 3.9% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 76.6° F; 0.4% above 100-year average)
- Coldest winter: 1936 (Three-month average temperature: 30° F; -18.0% below 100-year average)

 

Washington: 1.7° F per century
47/unsplash

Washington: 1.7° F per century

- Highest annual temperature: 50° F (2015; 7.6% above 100-year average)
- Lowest annual temperature: 43.4° F (1955; 6.6% below 100-year average)
- Hottest summer: 2015 (Three-month average temperature: 66.9° F; 0.7% above 100-year average)
- Coldest winter: 1949 (Three-month average temperature: 22.3° F; -28.5% below 100-year average)

 

West Virginia: 0.8° F per century
48/Andre Carrotflower // Wikimedia Commons

West Virginia: 0.8° F per century

- Highest annual temperature: 54.3° F (1921; 4.8% above 100-year average)
- Lowest annual temperature: 49.3° F (1963; 4.9% below 100-year average)
- Hottest summer: 2010 (Three-month average temperature: 73° F; 0.4% above 100-year average)
- Coldest winter: 1977 (Three-month average temperature: 24.5° F; -24.6% below 100-year average)

 

Wisconsin: 1.9° F per century
49/pixabay

Wisconsin: 1.9° F per century

- Highest annual temperature: 47.4° F (2012; 10.7% above 100-year average)
- Lowest annual temperature: 39.5° F (1924; 7.7% below 100-year average)
- Hottest summer: 1988 (Three-month average temperature: 70.5° F; 0.5% above 100-year average)
- Coldest winter: 2014 (Three-month average temperature: 8.4° F; -50% below 100-year average)

 

Wyoming: 2.2° F per century
50/jcookfisher // Flickr

Wyoming: 2.2° F per century

- Highest annual temperature: 44.8° F (2012; 8.6% above 100-year average)
- Lowest annual temperature: 38.4° F (1929; 6.9% below 100-year average)
- Hottest summer: 1988 (Three-month average temperature: 66.5° F; 0.6% above 100-year average)
- Coldest winter: 1979 (Three-month average temperature: 11.9° F; -43.4% below 100-year average)

 

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