United States of America
St. Louis sees feels-like daytime highs peak around 40.1°C in July and nighttime lows bottom out near -4.1°C in January. May is the wettest month (~107 mm), while February is the driest (~43 mm). For sunshine, August leads with about 69% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are May, September, and October — expect around 17.7–29.2°C with roughly 40% chance of rain on a given day in May.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | -4.1° / 3.6° | 11% | 44 mm | 48% | 15 kph |
| February | -1.7° / 7° | 13% | 43 mm | 47% | 15.3 kph |
| March | 3.9° / 13.9° | 24% | 69 mm | 50% | 15.7 kph |
| April | 11° / 21.6° | 35% | 93 mm | 54% | 15 kph |
| May☀ | 17.7° / 29.2° | 40% | 107 mm | 53% | 12.7 kph |
| June | 24.1° / 36.6° | 38% | 95 mm | 59% | 10.7 kph |
| July | 27.1° / 40.1° | 34% | 80 mm | 66% | 9.4 kph |
| August | 25.4° / 38.2° | 31% | 75 mm | 69% | 9.5 kph |
| September☀ | 19° / 31.4° | 26% | 75 mm | 69% | 10.9 kph |
| October☀ | 11.1° / 21.6° | 25% | 77 mm | 63% | 12.6 kph |
| November | 4.5° / 12.8° | 23% | 79 mm | 54% | 13.9 kph |
| December | -1.8° / 5.9° | 17% | 64 mm | 48% | 14.4 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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