Climate
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The climate of the St. Louis area is like the character of the region: balanced. St. Louis enjoys the advantages of four full seasons with few extremes.
Average monthly temperatures range from 31.8° in January to 80.0° in July, with a normal January low of 23.8° and a normal July high of 89.1°.
St. Louis averages around 43 days each year with temperatures above 90° and 21 days with high temperatures below 32°. The 30 year annual average of percipitation* is 40.92 inches and of snowfall is 18.2 inches (1981-2010).
| Average Normal High and Low Temperature 1981-2010 |
| January |
High: 39.9° Low: 23.7°
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| February |
Hight: 45.0° Low: 27.6°
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| March |
High: 55.9° Low: 36.6°
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| April |
High: 67.4° Low: 47.2°
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| May |
High: 76.3° Low: 57.2°
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| June |
High: 85.1° Low: 66.8°
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| July |
High: 89.1° Low: 71.0°
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| August |
High: 87.9° Low:69.4°
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| September |
High: 80.2° Low: 60.6°
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| October |
High: 68.5° Low: 49.0°
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| November |
High: 55.5° Low: 38.1°
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| December |
High: 42.5° Low: 26.9°
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Source: NOAA's National Weather Service. St. Louis, MO Weather Forecast Office.
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*Note: Precipitation includes rainfall and melted snowfall.