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Tulsa County Climate Summary Oklahoma Climatological Survey www.ocs.ou.edu TEMPERATURE PRECIPITATION OTHER FACTS WINTER WEATHER Average Annual: 60 degrees Average Maximum: 71 degrees Average Minimum: 49 degrees Highest: 115 degrees (Keystone, July 13, 1954) Lowest: -15 degrees (Keystone, January 30, 1949) Days of 90 Degrees or Higher: 71 Days of 20 Degrees or Lower: 25 Average Annual: 41.91 inches Days With Precipitation: 83 Wettest Year: 69.92 inches in 1973 Driest Year: 19.51 inches in 1966 Greatest Daily Rainfall: 7.54 inches (Tulsa, July 27, 1963) Average Annual Snowfall: 8.3 inches Days with snow on ground: 7 Greatest Seasonal Snowfall: 36.3 inches (1923-1924) Greatest Daily Snowfall: 12.9 inches (Tulsa, March 9, 1994) Last Freeze in Spring: April 3 First Freeze in Autumn: October29 Growing Season: 208 Days Average Wind Speed: 7 mph Sunshine: 50- 80% Average Humidity: 47% Thunderstorm Days: 50 Hail Events: 3 per year Tornadoes (1950-2003): 68

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Tulsa County Climate Summary

OklahomaClimatological Survey

www.ocs.ou.edu

TEMPERATURE

PRECIPITATION

OTHER FACTS

WINTER WEATHER

Average Annual: 60 degreesAverage Maximum: 71 degreesAverage Minimum: 49 degreesHighest: 115 degrees (Keystone, July 13, 1954) Lowest: -15 degrees (Keystone, January 30, 1949) Days of 90 Degrees or Higher: 71Days of 20 Degrees or Lower: 25

Average Annual: 41.91 inchesDays With Precipitation: 83Wettest Year: 69.92 inches in 1973Driest Year: 19.51 inches in 1966Greatest Daily Rainfall: 7.54 inches (Tulsa, July 27, 1963)

Average Annual Snowfall: 8.3 inchesDays with snow on ground: 7Greatest Seasonal Snowfall: 36.3 inches (1923-1924)Greatest Daily Snowfall: 12.9 inches (Tulsa, March 9, 1994) Last Freeze in Spring: April 3 First Freeze in Autumn: October29 Growing Season: 208 Days

Average Wind Speed: 7 mphSunshine: 50- 80%Average Humidity: 47%Thunderstorm Days: 50Hail Events: 3 per yearTornadoes (1950-2003): 68