March weather in St. Charles, MO
The average temperature in St. Charles in March is 44.4°F (33.7°F–55.2°F). Average precipitation: 3.63 inches. Average snowfall is 0.5 inches.
March is a spring month in St. Charles, and is cooler than the annual average of 55.5°F. Daily temperatures swing about 21.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 11h 44m. For travel, March is cool.
Avg High
55.2°F
Avg Low
33.7°F
Precipitation
3.63 in
Snow
0.5 in
March records in St. Charles
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 84.0°F (1972) | 0.0°F (1947) | 0.85 in (2017) |
| March 2 | 77.0°F (1923) | 0.0°F (1947) | 0.91 in (1948) |
| March 3 | 82.9°F (2022) | 0.0°F (1947) | 1.25 in (1988) |
| March 4 | 82.9°F (1974) | -5.1°F (1978) | 2.68 in (1897) |
| March 5 | 87.1°F (1956) | -2.0°F (1978) | 2.44 in (1894) |
| March 6 | 87.1°F (1956) | -7.1°F (1978) | 1.13 in (1989) |
| March 7 | 82.9°F (1974) | -2.0°F (1899) | 2.00 in (1995) |
| March 8 | 86.0°F (1974) | 0.0°F (1947) | 1.64 in (1893) |
| March 9 | 81.0°F (1925) | 0.0°F (1947) | 1.83 in (1958) |
| March 10 | 88.0°F (1955) | 0.0°F (1947) | 1.84 in (1901) |
| March 11 | 86.0°F (2026) | 0.0°F (1947) | 1.52 in (1950) |
| March 12 | 84.0°F (1972) | -0.9°F (1948) | 1.98 in (1977) |
| March 13 | 87.1°F (1918) | 0.0°F (1947) | 2.40 in (1925) |
| March 14 | 81.0°F (1944) | 0.0°F (1947) | 1.87 in (1922) |
| March 15 | 84.0°F (2025) | 0.0°F (1947) | 1.34 in (1923) |
| March 16 | 89.1°F (1945) | 0.0°F (1947) | 1.12 in (1943) |
| March 17 | 81.0°F (1894) | 0.0°F (1947) | 1.09 in (1919) |
| March 18 | 81.0°F (1989) | 0.0°F (1947) | 2.47 in (2021) |
| March 19 | 88.0°F (1907) | 0.0°F (1947) | 2.38 in (1927) |
| March 20 | 84.9°F (1948) | 0.0°F (1947) | 1.51 in (1998) |
| March 21 | 91.9°F (1907) | 0.0°F (1947) | 1.71 in (1898) |
| March 22 | 91.0°F (1907) | 0.0°F (1947) | 1.13 in (1948) |
| March 23 | 91.0°F (1910) | 0.0°F (1947) | 1.13 in (2005) |
| March 24 | 93.0°F (1929) | 0.0°F (1947) | 2.03 in (1912) |
| March 25 | 87.1°F (1907) | 0.0°F (1947) | 2.38 in (1929) |
| March 26 | 84.0°F (1910) | 0.0°F (1947) | 1.09 in (2024) |
| March 27 | 93.0°F (2026) | 0.0°F (1947) | 1.80 in (2020) |
| March 28 | 87.1°F (1910) | 0.0°F (1947) | 2.95 in (1977) |
| March 29 | 88.0°F (1985) | 0.0°F (1947) | 1.64 in (2009) |
| March 30 | 86.0°F (1986) | 0.0°F (1947) | 2.05 in (1985) |
| March 31 | 89.1°F (1940) | 0.0°F (1947) | 3.81 in (1897) |