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)