United States Climate
Climate Zone and Historical Climate Data
United States Climatic Classifications
| Code | Description | Group | Number of states/regions | States/regions |
|---|---|---|---|---|
| Cfa | Humid subtropical, no dry season | Temperate | 21 | 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 |
| Dfb | Humid continental, no dry season, warm summer | Cold (continental) | 10 | Connecticut Maine Michigan Minnesota New Hampshire North Dakota Pennsylvania Utah Vermont Wisconsin |
| Dfa | Humid continental, no dry season, hot summer | Cold (continental) | 7 | Illinois Indiana Iowa Massachusetts Nebraska Ohio South Dakota |
| Bsk | Mid-latitude steppe | Arid | 4 | Montana Nevada New Mexico Wyoming |
| Cfb | Marine west coast, warm summer | Temperate | 2 | Hawaii West Virginia |
| Csa | Mediterranean, hot summer | Temperate | 2 | Arizona California |
| Csb | Mediterranean, warm summer | Temperate | 2 | Oregon |
| Dfc | Subartic, severe winter, no dry season, cool summer | Cold (continental) | 2 | Alaska Colorado |
| Dsb | Humid continental, dry warm summer | Cold (continental) | 1 | Washington |
| Dsc | Subartic, subalpine | Cold (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
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Nov | Oct | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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) | 6.46 | 7.22 | 8.38 | 9.05 | 10.48 | 9.86 | 10.8 | 10.08 | 7.6 | 6.73 | 5.7 | 6.78 | 8.26 |
| Average relative humidity (%) | 77.76 | 77.93 | 74.11 | 70.12 | 69.9 | 67.82 | 67.25 | 67.13 | 67.68 | 68.46 | 71.05 | 77.01 | 71.35 |
| Mean monthly sunshine hours | 6.76 | 7.44 | 9.49 | 11.8 | 13.01 | 13.68 | 13.7 | 12.97 | 11.19 | 8.31 | 7.28 | 6.66 | 10.19 |
United States Climate Graph
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 |
States/Regions
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Popular places in United States
- Spearfish South Dakota
- Holyoke Massachusetts
- Portsmouth Ohio
- Rodney Village Delaware
- Bethel Heights Arkansas
- Meadow Lake New Mexico
- Anderson South Dakota
- Woodridge District of Columbia
- Arlington Texas
- Beverly West Virginia
- Mapleton Utah
- Jenks Oklahoma
- Oregon City Oregon
- Pasco Washington
- High Point North Carolina
- Auburn Alabama
- Kingsland Georgia
- Pittsfield New Hampshire
- Cassville West Virginia
- Moore Oklahoma
- Clinton Maine
- Ponchatoula Louisiana
- St. Johns Oregon
- Merced California
- Helena-West Helena Arkansas
- Port Allen Louisiana
- Tualatin Oregon
- Severna Park Maryland
- Lemmon Valley Nevada
- Machias Maine
- Canby Oregon
- Carrboro North Carolina
- Lake Jackson Texas
- Long Beach Mississippi
- Ammon Idaho
- Smithfield Rhode Island
- Chalco Nebraska
- Ken Caryl Colorado
- Greenville North Carolina
- Elk River Idaho
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