St. Louis weather in January
January in St. Louis: cold, rainy, with clean air — a fair time to visit.
#12 of 12 months in St. Louis · #701 of 897 destinations to visit in January · comfort 54/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on St. Louis in January
No notes yet. Open St. Louis on the map to add the first one.
St. Louis climate normals — January
| Daytime high | 6°C / 42°F | 🧥 cold |
|---|---|---|
| Nighttime low | -2°C / 28°F | |
| Rainfall | 89 mm / 3.5 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 66% | 💧 humid |
| Dew point | -5°C / 22°F | |
| Sunshine | 5.1 h/day | |
| Daylight | 9.8 h | |
| Wind | 18 km/h / 11 mph | |
| Snowfall | 14.7 cm / 5.8 in | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is St. Louis?
Loading map…
St. Louis in January — FAQ
- Is January a good time to visit St. Louis?
- January in St. Louis: cold, rainy, with clean air — a fair time to visit. It ranks #12 of 12 months for St. Louis on SeasonMap's comfort score (54/100).
- What is the weather like in St. Louis in January?
- In January, St. Louis averages a daily high of 5.5°C and a low of -2.3°C, with about 88.5 mm of rain over roughly 8.6 rainy days.
- What is the air quality in St. Louis in January?
- St. Louis has a mean US Air Quality Index of about 36 in January.
- Does it snow in St. Louis in January?
- St. Louis sees roughly 14.7 cm of snowfall in January.