August weather in St. Charles, ID
The average temperature in St. Charles in August is 63.9°F (48.0°F–79.9°F). Average precipitation: 0.76 inches.
August is a summer month in St. Charles, and is warmer than the annual average of 41°F. Daily temperatures swing about 31.9°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 13h 42m. For travel, August is a comfortable month to visit.
Avg High
79.9°F
Avg Low
48.0°F
Precipitation
0.76 in
Daylight
13h 42m
August records in St. Charles
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.9°F (1926) | 36.0°F (1932) | 1.02 in (2021) |
| August 2 | 96.1°F (2000) | 36.0°F (1928) | 0.50 in (2011) |
| August 3 | 93.0°F (2003) | 34.0°F (1938) | 0.40 in (1930) |
| August 4 | 91.0°F (1942) | 36.0°F (1938) | 0.91 in (2019) |
| August 5 | 93.0°F (1994) | 39.9°F (1996) | 0.44 in (1993) |
| August 6 | 93.0°F (1994) | 37.9°F (1987) | 0.45 in (2014) |
| August 7 | 95.0°F (2001) | 37.9°F (1996) | 0.71 in (1943) |
| August 8 | 91.9°F (1936) | 39.0°F (1939) | 1.30 in (2008) |
| August 9 | 93.0°F (1940) | 37.0°F (1995) | 0.92 in (1983) |
| August 10 | 91.9°F (1928) | 37.0°F (1985) | 0.50 in (1926) |
| August 11 | 93.9°F (2003) | 39.9°F (2002) | 0.80 in (1983) |
| August 12 | 93.9°F (1940) | 36.0°F (1985) | 0.53 in (1942) |
| August 13 | 95.0°F (1940) | 37.9°F (1985) | 0.51 in (1978) |
| August 14 | 91.9°F (1940) | 36.0°F (1938) | 0.64 in (1968) |
| August 15 | 91.9°F (2003) | 36.0°F (1944) | 0.80 in (1987) |
| August 16 | 90.0°F (1929) | 34.0°F (1938) | 0.42 in (1943) |
| August 17 | 89.1°F (1934) | 36.0°F (1960) | 0.47 in (1983) |
| August 18 | 91.0°F (1934) | 34.0°F (1978) | 1.70 in (1977) |
| August 19 | 90.0°F (2001) | 34.0°F (1978) | 0.78 in (2021) |
| August 20 | 91.9°F (2003) | 32.0°F (1964) | 0.82 in (1959) |
| August 21 | 89.1°F (1935) | 34.0°F (1964) | 0.46 in (1986) |
| August 22 | 90.0°F (2009) | 35.1°F (1933) | 0.89 in (1968) |
| August 23 | 95.0°F (2009) | 32.0°F (1960) | 0.97 in (1946) |
| August 24 | 91.0°F (1931) | 32.0°F (1992) | 0.50 in (1946) |
| August 25 | 90.0°F (1931) | 30.9°F (1992) | 0.20 in (1984) |
| August 26 | 89.1°F (1926) | 30.0°F (1992) | 0.85 in (1977) |
| August 27 | 90.0°F (2001) | 30.9°F (1992) | 0.47 in (1925) |
| August 28 | 91.0°F (2001) | 32.0°F (1992) | 0.38 in (1952) |
| August 29 | 90.0°F (2001) | 32.0°F (1960) | 0.42 in (1971) |
| August 30 | 91.0°F (1954) | 30.0°F (1964) | 0.31 in (1923) |
| August 31 | 89.1°F (2007) | 32.0°F (1932) | 0.79 in (2000) |