February weather in O'Fallon, MO
The average temperature in O'Fallon in February is 34.6°F (24.4°F–44.8°F). Average precipitation: 2.43 inches. Average snowfall is 3.7 inches.
February is a winter month in O'Fallon, and is cooler than the annual average of 55.2°F. Daily temperatures swing about 20.4°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 10h 32m. For travel, February is cold.
Avg High
44.8°F
Avg Low
24.4°F
Precipitation
2.43 in
Snow
3.7 in
February records in O'Fallon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| February 1 | 73.9°F (1989) | -8.0°F (1979) | 1.91 in (1982) |
| February 2 | 69.1°F (2024) | -8.0°F (1979) | 2.00 in (1986) |
| February 3 | 70.0°F (2020) | -9.0°F (1985) | 2.36 in (1986) |
| February 4 | 73.9°F (2025) | -7.1°F (1980) | 1.36 in (2012) |
| February 5 | 78.1°F (1962) | -13.0°F (1979) | 0.85 in (1971) |
| February 6 | 63.0°F (1974) | -13.0°F (1996) | 1.58 in (2008) |
| February 7 | 75.0°F (1992) | -6.0°F (2014) | 1.76 in (1999) |
| February 8 | 70.0°F (2015) | -7.1°F (2014) | 0.46 in (1969) |
| February 9 | 71.1°F (2000) | -7.1°F (1985) | 1.13 in (2023) |
| February 10 | 71.1°F (1999) | -9.0°F (1979) | 2.71 in (1959) |
| February 11 | 79.0°F (1976) | -9.0°F (1981) | 1.13 in (2009) |
| February 12 | 73.0°F (2017) | -14.1°F (1981) | 0.51 in (1993) |
| February 13 | 73.0°F (1990) | -4.0°F (1988) | 0.84 in (1964) |
| February 14 | 84.9°F (1962) | -2.0°F (2021) | 0.73 in (2007) |
| February 15 | 73.0°F (1967) | -8.0°F (1986) | 1.58 in (2026) |
| February 16 | 79.0°F (2018) | -6.0°F (1958) | 0.63 in (1998) |
| February 17 | 73.9°F (2011) | -8.0°F (1958) | 1.04 in (2008) |
| February 18 | 75.0°F (2011) | -5.1°F (1978) | 2.62 in (2000) |
| February 19 | 73.0°F (1971) | -7.1°F (1978) | 0.71 in (1988) |
| February 20 | 75.0°F (2017) | -0.9°F (2025) | 1.52 in (1997) |
| February 21 | 79.0°F (2017) | -2.0°F (2025) | 0.84 in (2018) |
| February 22 | 73.9°F (2000) | -4.0°F (1963) | 1.08 in (1971) |
| February 23 | 77.0°F (1995) | 1.0°F (1968) | 1.56 in (1985) |
| February 24 | 81.0°F (2000) | 3.9°F (1967) | 1.51 in (2018) |
| February 25 | 78.1°F (1976) | -5.1°F (1967) | 1.19 in (2007) |
| February 26 | 78.1°F (1995) | 3.0°F (1963) | 2.21 in (1997) |
| February 27 | 80.1°F (2024) | 1.0°F (2015) | 0.60 in (1977) |
| February 28 | 82.9°F (2024) | 0.0°F (2015) | 0.65 in (2021) |
| February 29 | 78.1°F (1972) | 12.0°F (1960) | 0.19 in (2012) |