St. Louis in March
In March, St. Louis averages 13°C (56°F) during the day and 3°C (37°F) at night, with frequent rain — about 16 days of the month see precipitation (133 mm total).
ShoulderConditions are cool — bring a jacket for evenings. Expect daily rain or showers, often in heavy bursts.
March is one of the wetter and less comfortable months in St. Louis. If your dates are flexible, consider a different time of year.
How March compares to the rest of the year in St. Louis
March is in the middle of the year for warmth in St. Louis (8th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 6°C below the annual average (19°C). March runs 6°C warmer than February (7°C) and warms a further 6°C into April (19°C).
March sunrise & sunset in St. Louis
Times shown for St. Louis local time (America/Chicago), calculated for the 15th of March. They shift by a few minutes day to day across the month.
Photography light in St. Louis — March
Golden-hour and blue-hour windows for the 15th of March, in St. Louis's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — St. Louis in March
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on March's tier (Shoulder) and St. Louis's popularity.
Crowds & pricing — March in St. Louis
St. Louis is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — March in St. Louis
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
St. Louis in other months
| 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 | — |
Other cities with similar March weather
🌍 See the full ranked list of climate twins for St. Louis in March →
Frequently asked questions
How hot is St. Louis in March?
In March, St. Louis averages a high of 13°C (56°F) and a low of 3°C (37°F) — generally cool.
Does it rain a lot in St. Louis in March?
March is quite rainy in St. Louis, with about 16 rainy days on average.
Is March a good time to visit St. Louis?
March is cool but on the rainy side. It suits travelers who are comfortable with cool weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for St. Louis in March?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full March packing list for St. Louis for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.