National Climate Extremes Committee (NCEC)
Existing Records
| Temperature | |||
|---|---|---|---|
| Maximum | 134°F (56.7°C) | July 10, 1913 | Greenland Ranch, CA |
| Minimum | -80°F (-62.2°C) | January 23, 1971 | Prospect Creek, AK |
| Max 24-hr Change | 103°F (57.2°C) | January 14-15, 1972 | Loma, MT |
| Snow | |||
| Max 24-hr Snowfall | 75.8 in (1925.3 mm) | April 14-15, 1921 | Silver Lake, CO |
| Max Seasonal Snowfall (July-June) | 1140 in (28,956 mm) | 1998-1999 | Mt. Baker Ski Area, WA |
| Max Snow Depth | 451 in (11,455 mm) | March 11, 1911 | Tamarack, CA |
| Rain | |||
| Maximum 24-Hour | 43 in (1092 mm) | July 25-26, 1979 | Alvin, TX |
| Least Annual | 0.00 in (0.00 mm) | 1929 | Death Valley, CA** |
| Maximum Annual | 704.83 in (17,902.7 mm) | 1982 | Kukui, HI |
| Longest Dry Period | 767 days | Oct 3, 1912-Nov 8,1914 | Bagdad, CA |
| Wind | |||
| Maximum Gust | 231 mph (372 km/hr) | April 12, 1934 | Mt. Washington, NH |
| Hail | |||
| Largest (diameter) | 8 in (203.2 mm) | July 23, 2010 | Vivian, SD |
| Largest (circumference) | 18.75 in (476.25 mm) | June 22, 2003 | Aurora, NE |
| Heaviest | 1.938 lb (0.879 kg) | July 23, 2010 | Vivian, SD |
| Pressure | |||
| Lowest | 26.35 in of Hg (892.3 mb) | September 2, 1935 | Matecumbe Key, FL |
| Highest | 31.85 in of Hg (1078.6 mb) | January 31, 1989 | Northway, AK |
** Denotes that record has occurred at an earlier date at other location(s)


