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 |
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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 |
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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 |
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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