April weather in Lake St. Louis, MO
The average temperature in Lake St. Louis in April is 55.4°F (43.8°F–67.0°F). Average precipitation: 4.70 inches. Average snowfall is 0.2 inches.
April is a spring month in Lake St. Louis, and is warmer than the annual average of 55.2°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 1m. For travel, April is a comfortable month to visit.
Avg High
67.0°F
Avg Low
43.8°F
Precipitation
4.70 in
Snow
0.2 in
April records in Lake St. Louis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 89.1°F (2010) | 21.9°F (1987) | 1.76 in (2008) |
| April 2 | 89.1°F (2010) | 19.9°F (1961) | 2.97 in (2024) |
| April 3 | 91.0°F (2012) | 21.0°F (1962) | 2.40 in (2014) |
| April 4 | 90.0°F (2011) | 19.9°F (1975) | 1.69 in (2014) |
| April 5 | 84.9°F (2010) | 21.0°F (1975) | 4.20 in (2025) |
| April 6 | 89.1°F (1967) | 21.0°F (1982) | 1.13 in (1965) |
| April 7 | 86.0°F (1967) | 21.9°F (1994) | 0.90 in (2003) |
| April 8 | 84.9°F (1959) | 21.9°F (2007) | 2.28 in (2015) |
| April 9 | 89.1°F (2020) | 21.0°F (1972) | 1.16 in (2015) |
| April 10 | 90.0°F (2011) | 18.0°F (1989) | 1.05 in (2009) |
| April 11 | 89.1°F (2011) | 21.0°F (1989) | 2.10 in (1994) |
| April 12 | 88.0°F (1965) | 24.1°F (1990) | 2.54 in (1979) |
| April 13 | 88.0°F (1972) | 21.0°F (1989) | 1.67 in (1993) |
| April 14 | 88.0°F (2006) | 26.1°F (1997) | 1.80 in (2012) |
| April 15 | 91.9°F (2006) | 27.0°F (1962) | 1.48 in (1991) |
| April 16 | 90.0°F (2002) | 24.1°F (1962) | 1.27 in (1972) |
| April 17 | 90.0°F (1967) | 28.0°F (2018) | 0.91 in (2013) |
| April 18 | 89.1°F (2002) | 28.9°F (1983) | 1.85 in (2019) |
| April 19 | 93.9°F (2002) | 21.0°F (1983) | 1.92 in (1970) |
| April 20 | 87.1°F (2011) | 24.1°F (1983) | 2.22 in (2002) |
| April 21 | 90.0°F (1987) | 30.0°F (2013) | 1.65 in (1984) |
| April 22 | 90.0°F (1965) | 28.0°F (1982) | 2.02 in (1996) |
| April 23 | 91.0°F (1963) | 28.9°F (1986) | 1.15 in (1966) |
| April 24 | 91.0°F (1965) | 27.0°F (1963) | 3.21 in (1970) |
| April 25 | 90.0°F (1965) | 30.0°F (1968) | 1.91 in (1993) |
| April 26 | 91.0°F (1986) | 28.0°F (1976) | 0.72 in (2020) |
| April 27 | 91.0°F (1989) | 34.0°F (1965) | 1.75 in (2016) |
| April 28 | 89.1°F (1990) | 28.9°F (1992) | 2.03 in (1994) |
| April 29 | 91.9°F (1970) | 30.0°F (1988) | 2.00 in (1996) |
| April 30 | 88.0°F (1970) | 30.9°F (1988) | 4.21 in (2017) |