St. Louis weather by month
St. Louis has warm summers, cold winters and plenty of rain. The most pleasant months are April to May and September to October.
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Month by month
Average daytime high, night low, rain or snow, how the air feels and how strong the sun is, 1991–2020. Best months are highlighted.
| Month | High | Low | Rain | Air | Sun |
|---|---|---|---|---|---|
| January | 41°F 5°C | 23°F -5°C | 2.3 in 58 mm | Dry | Weak sun |
| February | 46°F 8°C | 27°F -3°C | 2.3 in 58 mm | Dry | Moderate sun |
| March | 57°F 14°C | 36°F 2°C | 3.4 in 86 mm | Dry | Moderate sun |
| April | 69°F 21°C | 46°F 8°C | 3.9 in 99 mm | Dry | Sunny |
| May | 79°F 26°C | 57°F 14°C | 4.7 in 120 mm | Comfortable | Sunny |
| June | 87°F 31°C | 67°F 19°C | 4.0 in 101 mm | A little humid | Strong sun |
| July | 90°F 32°C | 70°F 21°C | 4.1 in 103 mm | Humid | Strong sun |
| August | 89°F 32°C | 68°F 20°C | 3.3 in 83 mm | Humid | Strong sun |
| September | 83°F 28°C | 59°F 15°C | 3.7 in 93 mm | A little humid | Sunny |
| October | 71°F 22°C | 47°F 9°C | 2.9 in 74 mm | Comfortable | Moderate sun |
| November | 56°F 14°C | 36°F 2°C | 3.4 in 86 mm | Dry | Moderate sun |
| December | 45°F 7°C | 28°F -2°C | 2.8 in 70 mm | Dry | Weak sun |
Cities with a climate like St. Louis
Whole-year match out of 100, one city per country, seasons lined up across the equator.