Weather in St. Louis
What's the weather like in St. Louis?
St. Louis has a wide swing between hot summers and cold winters and moderate rainfall spread across the year. Average daytime highs range from 5°C (41°F) in January to 31°C (87°F) in July, with overnight lows around -4°C (25°F) and 21°C (70°F) respectively.
For comfortable sightseeing temperatures (18–26°C daytime highs), the best months to visit St. Louis are April through May, and September through October.
Quick facts
- Country
- 🇺🇸 United States
- Region
- North America
- Time zone
- America/Chicago
- Coordinates
- 38.627, -90.199
Monthly climate
Long-run averages for each month of the year.
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 5°C / 41°F | -4°C / 25°F | 74 mm | 13 | — |
| February | 7°C / 45°F | -4°C / 26°F | 72 mm | 13 | — |
| March | 13°C / 56°F | 3°C / 37°F | 133 mm | 16 | — |
| April | 19°C / 66°F | 8°C / 46°F | 132 mm | 16 | — |
| May | 25°C / 76°F | 14°C / 58°F | 130 mm | 20 | — |
| June | 30°C / 86°F | 20°C / 67°F | 137 mm | 17 | — |
| July | 31°C / 87°F | 21°C / 70°F | 152 mm | 17 | — |
| August | 30°C / 85°F | 20°C / 69°F | 140 mm | 18 | — |
| September | 27°C / 81°F | 17°C / 63°F | 112 mm | 13 | — |
| October | 20°C / 68°F | 10°C / 51°F | 106 mm | 14 | — |
| November | 12°C / 54°F | 3°C / 37°F | 77 mm | 12 | — |
| December | 8°C / 46°F | -1°C / 31°F | 76 mm | 10 | — |
St. Louis by month
Detailed weather for any specific month:
Seasonal patterns to know
Atlantic hurricane season runs June–November (peak August–October). Tropical storms and hurricanes are possible — peak risk is August–October.
Cities with a similar climate to St. Louis
Frequently asked questions
When is the best time to visit St. Louis?
The most comfortable months in St. Louis are usually April, September, October, when average highs sit near 18–26°C (64–79°F) with relatively little rain. See the full month-by-month breakdown for the exact figures.
What is the hottest month in St. Louis?
July is typically the hottest month in St. Louis, averaging a high of 31°C (87°F).
What is the coldest month in St. Louis?
January is usually the coldest, with average lows around -4°C (25°F).
Does it snow in St. Louis?
Snow is rare in St. Louis; the climate data shows essentially no snowfall across the year.
Live forecast, sunrise/sunset, and more.