Oklahoma County Climate Summary Oklahoma Climatological Survey www.ocs.ou.edu TEMPERATURE PRECIPITATION OTHER FACTS WINTER WEATHER Average Annual: 61 degrees Average Maximum: 72 degrees Average Minimum: 49 degrees Highest: 110 degrees (Lake Overholser, July 8, 1970) Lowest: -17 degrees (Edmond, February 12, 1899) Days of 90 Degrees or Higher: 75 Days of 20 Degrees or Lower: 22 Average Annual: 36.21 inches Days With Precipitation: 72 Wettest Year: 48.11 inches in 1973 Driest Year: 15.15 inches in 1954 Greatest Daily Rainfall: 7.69 inches (Oklahoma City, May 19, 1955) Average Annual Snowfall: 7.0 inches Days with snow on ground: 4 Greatest Seasonal Snowfall: 24.6 inches (1967-1968) Greatest Daily Snowfall: 8.4 inches (Oklahoma City, March 10, 1948) Last Freeze in Spring: April 4 First Freeze in Autumn: November 1 Growing Season: 211 Days Average Wind Speed: 7 mph Sunshine: 55- 80% Average Humidity: 67% Thunderstorm Days: 49 Hail Events: 4 per year Tornadoes (1950-2003): 86