Oklahoma Annual Rainfall and Climate Data, see below for individual cities 

 

Oklahoma city precipitation totals

City

Avg Annual Precip

Avg Annual Snow 

 Avg # days of Precip

Avg # thunderstorm days

 Avg # hail days Avg # severe thunderstorm watches per year Avg # tornado watches per year # of tornadoes reported in county, 1960-2010
Oklahoma City 35.85 9.6 83 50 4 10 16 88
Tulsa 42.42 10.3 90 50 4 10 19 54
  • Oklahoma Annual Precipitation Average - 36.55", 30th wettest in the U.S.
  • Oklahoma Tornado Average - 52.2 per year - 2nd most in the U.S.
  • Largest reported Tornado in Oklahoma from 1950-2011, 5/10/2010 - 2,460 yards / 1.3 miles wide
  • Date with highest number of reported Tornadoes in Oklahoma from 1950-2011, May 10th - 92 tornadoes
  • Average time of occurrence of reported Tornadoes in Oklahoma from 1950-2011 - 4:38 pm
  • Oklahoma Annual Lightning Density - 15.1 flashes per square mile - 6th highest in U.S.
  • Record Driest year in Oklahoma from 1895-2012 - 1910, avg precipitation 19.04 inches 
  • Record Wettest year in Oklahoma from 1895-2012 - 1957, avg precipitation 48.21 inches  


Oklahoma Precipitation Records 

  • Driest location ranked by lowest annual average precipitation: Regnier, western Oklahoma, 15.62"
  • Wettest location ranked by highest annual average precipitation: Smithville, southeastern Oklahoma, 55.71"
  • Snowiest location ranked by highest annual average snowfall: Boise City, western Oklahoma, 31.6"
  • State precipitation record for 24 hours - Enid, north-central Oklahoma, 10/10-11/1973, 15.68"
  • State precipitation record for 1 year - Kiamichi Tower, southeastern Oklahoma, 1957, 84.47"
  • State snowfall record for 24 hours - Buffalo, northwestern Oklahoma, 2/21/1971, 23.0" 
  • State snow record for 1 season - Beaver, northwestern Oklahoma, 1911-1912, 87.3"
  • On 9/4/1940, Hallett, Oklahoma in the north-central part of the state received the 15th highest recorded 
    24-hour rainfall in U.S. history with a total of 24.00 inches. 
  • Based on cities with 100,000 or more in population, Oklahoma City is the most tornado-prone city in the U.S.
    Tulsa is the second most tornado-prone city in the United States. 
  • During the month of May, an average of 20 tornadoes are sighted within the State
  • On May 3, 1999, a powerful tornado struck Oklahoma City, destroying 1,000 homes and causing over $1 billion 
    in damages. A radar estimated wind speed of 318 mph was indicated and is the highest observation to date.
  • On April 2, 1982 a violent tornado near Messer Oklahoma left only the carpet tack strips on the slab of a house it
    destroyed, and carried a motel sign thirty miles.
  • Oklahoma experiences the second highest total of tornadoes in the U.S. annually with an average of 8.2 
    tornadoes per 10,000 square miles.. Florida is ranked first, with an average of 9.4 tornadoes.
  • Based on frequency and severity of hail, Tulsa, Oklahoma is the most hail-prone city in the U.S.
  • 90% of Oklahoma receives more precipitation in May than during any other month
  • Oklahoma temperature averages and extremes, precipitation and temperature data for all U.S. states and
    interesting Top 10 U.S. climate extremes

Data sources: National Climatic Data Center, Severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center, Tornado climate data - NOAA Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala