St. Louis, MO Weather & Climate Normals
St. Louis's real weather, in one number
St. Louis, MO scores 44/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
St. Louis's hottest and coldest months
St. Louis's hottest month is Jul, averaging 81°F; its coldest is Jan, averaging 33°F, a 48°F swing across the year, one of the widest gaps in this dataset.
St. Louis's weather across the year
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 41°F | 25°F | 2.71in |
| Feb | 46°F | 28°F | 2.28in |
| Mar | 56°F | 38°F | 3.61in |
| Apr | 68°F | 48°F | 4.83in |
| May | 77°F | 59°F | 4.9in |
| Jun | 86°F | 67°F | 4.74in |
| Jul | 90°F | 72°F | 4.21in |
| Aug | 89°F | 70°F | 3.75in |
| Sep | 82°F | 62°F | 3.41in |
| Oct | 70°F | 50°F | 3.2in |
| Nov | 56°F | 39°F | 3.69in |
| Dec | 45°F | 30°F | 2.58in |
Apr, May, Sep, and Oct are the best time to see St. Louis at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in St. Louis
Over a typical year, St. Louis sees about 43.91in of precipitation a year across roughly 0 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where St. Louis ranks
St. Louis ranks 3643 of 4876 US cities in this dataset for comfort score, and 73 of 135 within MO. About 279,695 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from St Louis Sci Ctr, MO US, 1.5 miles from St. Louis, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · How the comfort score is calculated