July weather in St. Charles, MO
The average temperature in St. Charles in July is 78.2°F (68.3°F–88.0°F). Average precipitation: 4.20 inches.
July is a summer month in St. Charles, and is warmer than the annual average of 55.5°F. Daily temperatures swing about 19.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 28m. For travel, July is hot.
Avg High
88.0°F
Avg Low
68.3°F
Precipitation
4.20 in
Daylight
14h 28m
July records in St. Charles
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 104.0°F (1931) | 0.0°F (1947) | 2.31 in (1947) |
| July 2 | 106.0°F (1980) | 0.0°F (1947) | 1.92 in (1986) |
| July 3 | 104.0°F (1934) | 0.0°F (1947) | 1.90 in (1992) |
| July 4 | 104.0°F (1936) | 0.0°F (1947) | 2.74 in (1998) |
| July 5 | 106.0°F (1936) | 0.0°F (1947) | 2.10 in (1928) |
| July 6 | 107.1°F (1936) | 0.0°F (1947) | 2.23 in (2019) |
| July 7 | 108.0°F (1936) | 0.0°F (1947) | 5.88 in (1987) |
| July 8 | 100.0°F (1930) | 0.0°F (1947) | 2.07 in (1898) |
| July 9 | 108.0°F (1936) | 0.0°F (1947) | 3.07 in (2010) |
| July 10 | 108.0°F (1936) | 0.0°F (1947) | 2.00 in (1969) |
| July 11 | 109.0°F (1901) | 0.0°F (1947) | 1.48 in (1971) |
| July 12 | 111.0°F (1936) | 0.0°F (1947) | 1.52 in (1915) |
| July 13 | 109.9°F (1936) | 0.0°F (1947) | 0.98 in (2009) |
| July 14 | 115.0°F (1954) | 0.0°F (1947) | 1.51 in (1907) |
| July 15 | 109.0°F (1936) | 0.0°F (1947) | 1.41 in (1910) |
| July 16 | 107.1°F (1936) | 0.0°F (1947) | 3.20 in (1952) |
| July 17 | 106.0°F (1936) | 0.0°F (1947) | 3.05 in (1893) |
| July 18 | 113.0°F (1954) | 0.0°F (1947) | 1.42 in (1959) |
| July 19 | 111.0°F (1934) | 0.0°F (1947) | 3.55 in (1958) |
| July 20 | 114.1°F (1934) | 0.0°F (1947) | 2.72 in (1981) |
| July 21 | 108.0°F (1934) | 0.0°F (1947) | 2.10 in (1953) |
| July 22 | 109.0°F (1901) | 0.0°F (1947) | 1.85 in (1932) |
| July 23 | 114.1°F (1934) | 0.0°F (1947) | 1.46 in (1918) |
| July 24 | 114.1°F (1934) | 0.0°F (1947) | 2.54 in (1973) |
| July 25 | 111.0°F (1901) | 0.0°F (1947) | 3.86 in (1961) |
| July 26 | 107.1°F (1936) | 0.0°F (1947) | 9.20 in (2022) |
| July 27 | 109.9°F (1930) | 0.0°F (1947) | 2.10 in (2022) |
| July 28 | 111.9°F (1930) | 0.0°F (1947) | 2.72 in (1981) |
| July 29 | 107.1°F (1940) | 0.0°F (1947) | 3.20 in (1894) |
| July 30 | 105.1°F (1954) | 0.0°F (1947) | 2.05 in (2020) |
| July 31 | 102.9°F (1953) | 0.0°F (1947) | 2.83 in (1951) |