United States Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
CfaHumid subtropical, no dry seasonTemperate21 Alabama Arkansas Delaware Florida Georgia Kansas Kentucky Louisiana Maryland Mississippi Missouri New Jersey New York North Carolina Oklahoma Rhode Island South Carolina Tennessee Texas Virginia
DfbHumid continental, no dry season, warm summerCold (continental)10 Connecticut Maine Michigan Minnesota New Hampshire North Dakota Pennsylvania Utah Vermont Wisconsin
DfaHumid continental, no dry season, hot summerCold (continental)7 Illinois Indiana Iowa Massachusetts Nebraska Ohio South Dakota
BskMid-latitude steppeArid4 Montana Nevada New Mexico Wyoming
CfbMarine west coast, warm summerTemperate2 Hawaii West Virginia
CsaMediterranean, hot summerTemperate2 Arizona California
CsbMediterranean, warm summerTemperate2 Oregon
DfcSubartic, severe winter, no dry season, cool summerCold (continental)2 Alaska Colorado
DsbHumid continental, dry warm summerCold (continental)1 Washington
DscSubartic, subalpineCold (continental)1 Idaho

Summary: Most regions (21) in United States lie in the Humid subtropical, no dry season climate zone (Köppen: Cfa). The mean average of annual temperatures range from a high of 24.12°C (75.42°F) in Florida to a low of -1.95°C (28.49°F) in Alaska.

Climate United States: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)20.82(69.48)23.37(74.07)25.03(77.05)28.43(83.17)30.34(86.61)33.98(93.16)36.89(98.4)36.48(97.66)33.37(92.07)28.54(83.37)25.01(77.02)22.89(73.2)36.89(98.4)
Average high °C (°F)3.08(37.54)4.85(40.73)9.92(49.86)15.38(59.68)20.94(69.69)25.94(78.69)28.65(83.57)27.79(82.02)24.23(75.61)17.44(63.39)10.25(50.45)5.13(41.23)16.13(61.03)
Daily mean °C (°F)0.01(32.02)1.64(34.95)6.53(43.75)11.83(53.29)17.45(63.41)22.36(72.25)24.96(76.93)23.92(75.06)20.26(68.47)13.69(56.64)6.82(44.28)2.24(36.03)12.64(54.75)
Average low °C (°F)-4.43(24.03)-3.25(26.15)1.18(34.12)5.59(42.06)10.64(51.15)15.05(59.09)17.66(63.79)16.91(62.44)13.81(56.86)8.18(46.72)2.13(35.83)-1.73(28.89)6.81(44.26)
Record low °C (°F)-21.54(-6.77)-18.22(-0.8)-17.07(1.27)-8.49(16.72)-2.93(26.73)1.74(35.13)6.15(43.07)5.55(41.99)1.16(34.09)-6.08(21.06)-16.09(3.04)-19.64(-3.35)-21.54(-6.77)
Average precipitation mm (inches)41.28(1.63)46.44(1.83)48.44(1.91)57.09(2.25)62.39(2.46)57.44(2.26)59.56(2.34)59.04(2.32)44.93(1.77)46.6(1.83)35.15(1.38)45.11(1.78)50.29(1.98)
Average precipitation days (≥ 1.0 mm)6.467.228.389.0510.489.8610.810.087.66.735.76.788.26
Average relative humidity (%)77.7677.9374.1170.1269.967.8267.2567.1367.6868.4671.0577.0171.35
Mean monthly sunshine hours6.767.449.4911.813.0113.6813.712.9711.198.317.286.6610.19

United States Climate Graph

United States

United States’s Cities by Temperature

United States’s states/regions ranking by average yearly temperature:

Florida
24.12°C | 75.42°F
Louisiana
20.68°C | 69.22°F
Texas
20.34°C | 68.61°F
Georgia
20.27°C | 68.49°F
California
19.97°C | 67.95°F
Alabama
19.96°C | 67.93°F
Mississippi
19.57°C | 67.23°F
South Carolina
19.1°C | 66.38°F
Oklahoma
17.62°C | 63.72°F
Arkansas
17.24°C | 63.03°F
North Carolina
17.23°C | 63.01°F
Tennessee
16.38°C | 61.48°F
Hawaii
16.06°C | 60.91°F
Arizona
15.75°C | 60.35°F
Virginia
15.65°C | 60.17°F
United States Naval Base Guantanamo Bay
15.38°C | 59.68°F
District of Columbia
15.14°C | 59.25°F
Kansas
14.95°C | 58.91°F
Maryland
14.69°C | 58.44°F
Missouri
14.59°C | 58.26°F
Delaware
14.55°C | 58.19°F
Kentucky
14.34°C | 57.81°F
New Jersey
13.62°C | 56.52°F
New York
13.27°C | 55.89°F
New Mexico
13.14°C | 55.65°F
West Virginia
12.75°C | 54.95°F
Illinois
12.07°C | 53.73°F
Indiana
12.01°C | 53.62°F
Rhode Island
11.92°C | 53.46°F
Connecticut
11.47°C | 52.65°F
Massachusetts
11.45°C | 52.61°F
Nebraska
11.42°C | 52.56°F
Ohio
11.32°C | 52.38°F
Iowa
10.63°C | 51.13°F
Pennsylvania
10.55°C | 50.99°F
South Dakota
10.25°C | 50.45°F
Nevada
10.15°C | 50.27°F
Oregon
10.09°C | 50.16°F
Utah
9.7°C | 49.46°F
New Hampshire
9.66°C | 49.39°F
Wyoming
8.67°C | 47.61°F
Wisconsin
8.32°C | 46.98°F
Michigan
8.11°C | 46.6°F
Washington
7.46°C | 45.43°F
Vermont
7.21°C | 44.98°F
Maine
7.0°C | 44.6°F
North Dakota
6.91°C | 44.44°F
Minnesota
6.19°C | 43.14°F
Montana
4.29°C | 39.72°F
Colorado
3.46°C | 38.23°F
Idaho
2.72°C | 36.9°F
Alaska
-1.95°C | 28.49°F

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