US Counties With the Lowest Average Temperature

3,143 US counties ranked by average temperature, from lowest to highest. First are North Slope Borough, AK (18.5), Northwest Arctic Borough, AK (23.3) and Nome Census Area, AK (25.1). The middle one of the 3,143 has 56.5.

What this measures

The average temperature over the year, in degrees Fahrenheit, across the whole county or state. NOAA builds it from weather station readings, filling the gaps between stations with a map of the area, and averages the twelve monthly figures. One unusually warm or cold year can stand out, so look at several years. Source: NOAA NCEI nClimDiv.

For most measures, a national ranking mostly sorts places by income and by how urban they are. Each county’s own page compares it with the 50 counties most like it instead, which is often the fairer view.

The 100 lowest counties

Rank	County	°F
1	North Slope Borough, AK	18.5
2	Northwest Arctic Borough, AK	23.3
3	Nome Census Area, AK	25.1
4	Yukon-Koyukuk Census Area, AK	26.2
5	Southeast Fairbanks Census Area, AK	26.4
6	Copper River Census Area, AK	26.7
7	Denali Borough, AK	27.2
8	Fairbanks North Star Borough, AK	28.7
9	Kusilvak Census Area, AK	29.1
10	Matanuska-Susitna Borough, AK	29.8
11	Bethel Census Area, AK	30.6
12	Skagway Municipality, AK	32.5
13	Anchorage Municipality, AK	32.8
14	Chugach Census Area, AK	33.4
15	Dillingham Census Area, AK	33.5
16	Kenai Peninsula Borough, AK	33.8
17	Lake County, CO	33.9
18	San Juan County, CO	34.2
19	Yakutat City and Borough, AK	34.5
20	Summit County, CO	34.8
21	Sublette County, WY	34.9
22	Hinsdale County, CO	35.1
23	Teton County, WY	35.1
24	Juneau City and Borough, AK	35.2
25	Lake and Peninsula Borough, AK	35.3
26	Haines Borough, AK	35.5
27	Jackson County, CO	35.7
28	Mineral County, CO	36.1
29	Bristol Bay Borough, AK	36.2
30	Grand County, CO	36.5
31	Clear Creek County, CO	36.7
32	Pitkin County, CO	37
33	Lincoln County, WY	37.7
34	Petersburg Borough, AK	37.7
35	Gunnison County, CO	37.7
36	Chaffee County, CO	37.8
37	Park County, CO	37.9
38	Custer County, ID	37.9
39	Deer Lodge County, MT	38.1
40	Kodiak Island Borough, AK	38.1
41	Beaverhead County, MT	38.1
42	Hoonah-Angoon Census Area, AK	38.4
43	Cook County, MN	38.5
44	Gilpin County, CO	38.6
45	Summit County, UT	38.7
46	Aleutians East Borough, AK	38.8
47	Eagle County, CO	38.8
48	Uinta County, WY	38.8
49	Routt County, CO	39.2
50	Lake County, MN	39.3
51	Valley County, ID	39.3
52	Park County, WY	39.4
53	Lemhi County, ID	39.4
54	Cavalier County, ND	39.4
55	Fremont County, ID	39.5
56	Rich County, UT	39.5
57	Clark County, ID	39.5
58	Saguache County, CO	39.5
59	Bear Lake County, ID	39.6
60	Teton County, ID	39.8
61	Silver Bow County, MT	39.9
62	Fremont County, WY	39.9
63	Aleutians West Census Area, AK	40
64	Rolette County, ND	40
65	Park County, MT	40.1
66	Madison County, MT	40.1
67	Burke County, ND	40.1
68	Towner County, ND	40.2
69	Wells County, ND	40.2
70	Steele County, ND	40.3
71	Sweetwater County, WY	40.3
72	Teller County, CO	40.3
73	Roseau County, MN	40.4
74	Daggett County, UT	40.4
75	Sheridan County, ND	40.4
76	Granite County, MT	40.4
77	Gallatin County, MT	40.4
78	Pierce County, ND	40.5
79	Kidder County, ND	40.5
80	Nelson County, ND	40.5
81	Butte County, ID	40.5
82	Ramsey County, ND	40.6
83	Albany County, WY	40.6
84	Bottineau County, ND	40.6
85	St. Louis County, MN	40.6
86	Pennington County, MN	40.7
87	Marshall County, MN	40.7
88	Carbon County, WY	40.7
89	Benson County, ND	40.7
90	Rio Grande County, CO	40.7
91	Conejos County, CO	40.8
92	Griggs County, ND	40.8
93	Koochiching County, MN	40.9
94	Renville County, ND	40.9
95	Powell County, MT	40.9
96	Foster County, ND	41
97	Pembina County, ND	41
98	Eddy County, ND	41
99	Walsh County, ND	41
100	Red Lake County, MN	41

Every state, lowest first

Each state’s own published figure, not an average of its counties.

Rank	State	°F
1	Alaska	28.4
2	Wyoming	41.8
3	North Dakota	42
4	Minnesota	43.8
5	Idaho	43.8
6	Montana	43.9
7	Maine	44.3
8	Colorado	45.6
9	Vermont	45.8
10	Wisconsin	46.3
11	New Hampshire	46.7
12	South Dakota	46.7
13	Michigan	47.4
14	Oregon	48
15	New York	48.2
16	Washington	48.4
17	Utah	48.5
18	Nevada	49.9
19	Nebraska	50.4
20	Iowa	50.5
21	Massachusetts	51.3
22	Pennsylvania	51.5
23	Connecticut	52.2
24	Rhode Island	52.5
25	Ohio	53.5
26	West Virginia	54
27	Indiana	54.3
28	Illinois	54.7
29	New Mexico	55.3
30	New Jersey	55.6
31	Kansas	56.3
32	Maryland	57.3
33	Missouri	57.4
34	Virginia	57.5
35	Delaware	57.8
36	Kentucky	58.1
37	California	58.3
38	Tennessee	60
39	Arizona	60.7
40	North Carolina	60.8
41	Oklahoma	61.8
42	Arkansas	62.9
43	South Carolina	64.3
44	Alabama	65.3
45	Georgia	65.6
46	Mississippi	66.7
47	Hawaii	66.8
48	Texas	68.1
49	Louisiana	69.6
50	Florida	73.3

More on average temperature

A ranking describes places, not the people in them, and a high or low place does not by itself say why. All US rankings.