May weather in St. Peters, MO
The average temperature in St. Peters in May is 64.9°F (53.5°F–76.3°F). Average precipitation: 4.80 inches.
May is a spring month in St. Peters, and is warmer than the annual average of 55.3°F. Daily temperatures swing about 22.8°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 7m. For travel, May is a comfortable month to visit.
Avg High
76.3°F
Avg Low
53.5°F
Precipitation
4.80 in
Daylight
14h 7m
May records in St. Peters
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (1992) | 37.0°F (2005) | 1.91 in (1983) |
| May 2 | 90.0°F (1992) | 37.0°F (1989) | 1.53 in (2007) |
| May 3 | 90.0°F (2012) | 34.0°F (2005) | 1.59 in (2024) |
| May 4 | 88.0°F (2012) | 34.0°F (2005) | 2.10 in (2013) |
| May 5 | 84.9°F (1980) | 35.1°F (2005) | 1.13 in (2003) |
| May 6 | 89.1°F (1982) | 37.0°F (1989) | 1.20 in (2022) |
| May 7 | 90.0°F (2012) | 37.0°F (1981) | 1.98 in (2000) |
| May 8 | 90.0°F (1986) | 37.0°F (1981) | 1.70 in (2008) |
| May 9 | 90.0°F (1986) | 34.0°F (1980) | 0.88 in (2002) |
| May 10 | 87.1°F (1986) | 36.0°F (2010) | 1.42 in (1981) |
| May 11 | 88.0°F (2005) | 39.9°F (1981) | 1.10 in (2008) |
| May 12 | 90.0°F (2011) | 37.0°F (2013) | 0.97 in (1990) |
| May 13 | 88.0°F (2005) | 35.1°F (2008) | 2.55 in (2002) |
| May 14 | 86.0°F (1982) | 37.9°F (2013) | 2.27 in (1983) |
| May 15 | 91.0°F (2013) | 39.0°F (1981) | 0.55 in (2024) |
| May 16 | 89.1°F (2013) | 39.0°F (2005) | 2.87 in (1990) |
| May 17 | 87.1°F (1982) | 37.0°F (2009) | 1.22 in (1990) |
| May 18 | 90.0°F (1991) | 37.9°F (2009) | 2.70 in (1981) |
| May 19 | 87.1°F (1984) | 41.0°F (2014) | 1.78 in (2004) |
| May 20 | 91.0°F (1987) | 42.1°F (1981) | 1.16 in (2025) |
| May 21 | 91.0°F (1987) | 43.0°F (1981) | 4.02 in (2013) |
| May 22 | 91.9°F (1987) | 43.0°F (1983) | 1.62 in (1983) |
| May 23 | 87.1°F (2004) | 46.0°F (1985) | 0.70 in (1992) |
| May 24 | 91.9°F (2010) | 46.0°F (1983) | 0.37 in (1981) |
| May 25 | 91.0°F (2010) | 44.1°F (1992) | 0.64 in (2003) |
| May 26 | 89.1°F (2010) | 45.0°F (1988) | 3.24 in (2008) |
| May 27 | 93.0°F (2012) | 45.0°F (1992) | 2.07 in (2000) |
| May 28 | 91.9°F (2006) | 43.0°F (1992) | 1.31 in (2021) |
| May 29 | 93.0°F (1991) | 39.9°F (1984) | 1.93 in (1982) |
| May 30 | 91.0°F (1989) | 43.0°F (1984) | 1.12 in (2015) |
| May 31 | 91.9°F (1989) | 44.1°F (1984) | 1.57 in (2008) |