St. Louis, MO weather in March
St. Louis is cool in March, with frequent rain: highs average 57°F and nights drop to about 37°F. Expect about 11 wet days. Snowfall averages about 2.3 in.
- Normal high
- 57°F
- Normal low
- 37°F
- Wet days
- 11
- 3.5 in total
- Snowfall
- 2.3 in
- snow on the ground 1 day
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 51°F | 63°F |
| Normal low | 32°F | 42°F |
| Chance of a wet day | 33% | 36% |
| Sunrise / sunset | 6:32 am / 5:53 pm | 6:46 am / 7:22 pm |
| Daylight | 11.3 h | 12.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical March day
- 6 am40°Fdew point 32°F
- 9 am45°Fdew point 33°F
- Noon51°Fdew point 34°F
- 3 pm54°Fdew point 34°F
- 6 pm52°Fdew point 34°F
- 9 pm47°Fdew point 34°F
NOAA hourly normals (local standard time) from St Louis Lambert Intl Airport (13 mi away); average wind 10 mph; clear or few clouds in 25% of daytime hours, mostly cloudy or overcast in 61%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below10 of 31
- Snow on the groundsnow depth 1 in or more1 of 31
Average days per March, counted from daily records for each year 1991-2020.
Rain and snow in March
Normal precipitation is 3.5 in; a dry March brings about 2.5 in and a wet one about 4.1 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 2.3 in, with about 1 day of an inch or more.
How March varies from year to year
- Warmest March, 1991-20202012: average high 72°F
- Coolest March2013: average high 49°F
- Wettest March2008: 8.4 in
- Driest March1994: 1.3 in
- Highest reading87°F (March 21, 1997)
- Lowest reading2°F (March 4, 2019)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
March compared with February and April
| February | March | April | |
|---|---|---|---|
| Normal high | 46°F | 57°F | 68°F |
| Normal low | 28°F | 37°F | 47°F |
| Wet days | 9 | 11 | 12 |
| Comfortable days | 3 | 8 | 13 |
| Daylight | 10.8 h | 12.0 h | 13.2 h |
Highs change by +11°F from February and +11°F into April.
Nearby alternatives in March
- Warmer: Branson, MO215 mi · high 62°F · 9 wet days
- Drier: Lee's Summit, MO226 mi · high 55°F · 7 wet days
- Cooler: Peoria, IL146 mi · high 51°F · 11 wet days
How St. Louis ranks in March
- Normal high215th warmest of 378 cities; 4th of 7 in Missouri
- Wet days269th driest of 378
- Comfortable days194th most of 339
What to pack for St. Louis in March
- A warm jacket – lows near 37°F, highs near 57°F
- A rain jacket or umbrella – rain or snow on about 11 days
Heating and cooling
March has 576 heating degree days and 7 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How cold is St. Louis in March?
The normal high is 57°F and the normal low is 37°F. From 1991 to 2020 the coldest March reading was 2°F (March 4, 2019).
Does it rain a lot in St. Louis in March?
About 11 days in March have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest March in 1991-2020 was in 2008 (8.4 in); the driest was in 1994 (1.3 in).
Does it snow in St. Louis in March?
Yes. Normal snowfall in March is 2.3 in, and snow covers the ground on about 1 day.
Is March a good time to visit St. Louis?
March ranks 5th of 12 months on our comfort score for St. Louis (55 out of 100). It has about 8 comfortable days. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, humidity and wind by hour and cloud cover: St Louis Lambert Intl Airport (USW00013994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Cahokia St Louis Airport (USW00003960), 4.4 mi SSE of the city center, 413 ft (51 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lambert-St Louis International Airport (724340-13994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). Hourly observations, 1991-2020.