St. Louis weather in March
March in St. Louis: cool, rainy, with clean air — a great time to visit.
#7 of 12 months in St. Louis · #602 of 897 destinations to visit in March · comfort 72/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on St. Louis in March
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St. Louis climate normals — March
| Daytime high | 14°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 4°C / 38°F | |
| Rainfall | 126 mm / 4.9 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 1°C / 33°F | |
| Sunshine | 7.4 h/day | |
| Daylight | 12 h | |
| Wind | 20 km/h / 12 mph | |
| Snowfall | 1.7 cm / 0.7 in | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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St. Louis in March — FAQ
- Is March a good time to visit St. Louis?
- March in St. Louis: cool, rainy, with clean air — a great time to visit. It ranks #7 of 12 months for St. Louis on SeasonMap's comfort score (72/100).
- What is the weather like in St. Louis in March?
- In March, St. Louis averages a daily high of 14.4°C and a low of 3.5°C, with about 125.7 mm of rain over roughly 12.8 rainy days.
- What is the air quality in St. Louis in March?
- St. Louis has a mean US Air Quality Index of about 42 in March.
- Does it snow in St. Louis in March?
- St. Louis sees roughly 1.7 cm of snowfall in March.