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St. Louis

The tables below display average monthly climate and weather indicators in St. Louis Missouri.

Temperature by: Fahrenheit / Centigrade

St. Louis Temperature Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Avg. Temperature 29.3 33.9 45.1 56.7 66.1 75.4 79.8 77.6 70.2 58.4 46.2 33.9 56.1
Avg. Max Temperature 37.7 42.6 54.6 66.9 76.1 85.2 89.3 87.3 79.9 68.5 54.7 41.7 65.4
Avg. Min Temperature 20.8 25.1 35.5 46.4 56.0 65.7 70.4 67.9 60.5 48.3 37.7 26.0 46.7
Days with Max Temp of 90 F or Higher 0.0 0.0 0.0 < 0.5 1.0 8.0 15.0 12.0 4.0 < 0.5 0.0 0.0 40.0
Days with Min Temp Below Freezing 26.0 20.0 13.0 3.0 < 0.5 0.0 0.0 0.0 0.0 1.0 11.0 22.0 97.0
  
St. Louis Heating and Cooling Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Heating Degree Days 1107 871 617 266 111 0.0 0.0 0.0 21.0 237 564 964 4758
Cooling Degree Days 0.0 0.0 0.0 17.0 145 312 459 391 177 33.0 0.0 0.0 1534
  
St. Louis Precipitation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Precipitation (inches) 1.8 2.1 3.6 3.5 4.0 3.7 3.9 2.9 3.1 2.7 3.3 3.0 37.5
Days with Precipitation 0.01 inch or More 9.0 8.0 11.0 11.0 11.0 9.0 9.0 8.0 8.0 8.0 10.0 9.0 111
Monthly Snowfall (inches) 5.4 4.4 4.0 0.5 0.0 < 0.05 < 0.05 0.0 0.0 < 0.05 1.4 3.8 19.5
  
Other St. Louis Weather Indicators Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Wind Speed 10.6 10.8 11.7 11.3 9.4 8.8 8.0 7.6 8.2 8.9 10.2 10.3 9.7
Clear Days 7.0 7.0 6.0 7.0 7.0 7.0 9.0 10.0 11.0 12.0 9.0 7.0 101
Partly Cloudy Days 7.0 6.0 8.0 8.0 9.0 11.0 11.0 11.0 8.0 7.0 7.0 7.0 101
Cloudy Days 17.0 15.0 16.0 15.0 14.0 12.0 10.0 10.0 10.0 11.0 15.0 17.0 164
Percent of Possible Sunshine 50.0 52.0 54.0 56.0 59.0 66.0 68.0 65.0 63.0 60.0 46.0 43.0 57.0
Avg. Relative Humidity 59.5 74.0 72.0 68.0 68.5 69.5 70.5 72.0 72.5 71.0 69.5 72.5 75.5

Weather information for other cities in Missouri
• Columbia Weather
• Kansas City Weather

 


 

Portions of this site are based on the CIA World Fact Book, a public-domain work
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