August weather in Ketchum, ID
The average temperature in Ketchum in August is 61.1°F (43.5°F–78.7°F). Average precipitation: 0.50 inches.
August is a summer month in Ketchum, and is warmer than the annual average of 40.2°F. Daily temperatures swing about 35.2°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 13h 48m. For travel, August is a comfortable month to visit.
Avg High
78.7°F
Avg Low
43.5°F
Precipitation
0.50 in
Daylight
13h 48m
August records in Ketchum
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 93.0°F (2000) | 30.0°F (1985) | 0.65 in (1976) |
| August 2 | 93.9°F (2000) | 32.0°F (1975) | 0.10 in (1998) |
| August 3 | 93.0°F (1992) | 34.0°F (1988) | 0.78 in (1976) |
| August 4 | 90.0°F (1979) | 32.0°F (1980) | 0.20 in (2009) |
| August 5 | 95.0°F (2022) | 24.1°F (2011) | 0.56 in (2000) |
| August 6 | 91.0°F (1983) | 36.0°F (1975) | 0.43 in (2024) |
| August 7 | 91.9°F (1983) | 32.0°F (1980) | 0.09 in (1988) |
| August 8 | 96.1°F (2001) | 28.9°F (1980) | 0.25 in (1993) |
| August 9 | 93.0°F (1990) | 30.0°F (1980) | 0.07 in (2019) |
| August 10 | 90.0°F (1990) | 32.0°F (1980) | 0.90 in (1981) |
| August 11 | 91.0°F (2018) | 30.9°F (1980) | 0.14 in (1997) |
| August 12 | 93.0°F (1996) | 28.9°F (2010) | 0.38 in (1989) |
| August 13 | 91.0°F (1992) | 33.1°F (1985) | 0.20 in (1999) |
| August 14 | 91.0°F (1992) | 33.1°F (1974) | 0.80 in (1987) |
| August 15 | 91.0°F (2003) | 30.9°F (1974) | 0.18 in (1976) |
| August 16 | 91.0°F (2003) | 30.0°F (1987) | 0.29 in (1980) |
| August 17 | 90.0°F (2023) | 28.9°F (1978) | 0.80 in (1976) |
| August 18 | 89.1°F (2020) | 28.9°F (1978) | 0.23 in (2004) |
| August 19 | 90.0°F (1986) | 28.9°F (1996) | 0.77 in (1990) |
| August 20 | 90.0°F (1992) | 28.9°F (1995) | 0.22 in (1975) |
| August 21 | 91.0°F (2003) | 30.0°F (1974) | 0.82 in (1993) |
| August 22 | 89.1°F (2009) | 28.9°F (1994) | 1.34 in (2014) |
| August 23 | 86.0°F (1982) | 19.9°F (1992) | 0.65 in (2003) |
| August 24 | 91.0°F (2025) | 23.0°F (1992) | 0.38 in (1975) |
| August 25 | 90.0°F (1988) | 19.0°F (1992) | 0.27 in (2009) |
| August 26 | 91.0°F (1988) | 19.0°F (1992) | 0.46 in (1980) |
| August 27 | 88.0°F (2001) | 19.9°F (1992) | 0.20 in (2015) |
| August 28 | 86.0°F (1974) | 26.1°F (1992) | 0.25 in (1991) |
| August 29 | 87.1°F (1974) | 24.1°F (1975) | 0.02 in (2002) |
| August 30 | 89.1°F (2001) | 21.9°F (1975) | 0.20 in (1986) |
| August 31 | 86.0°F (1987) | 28.0°F (1993) | 0.53 in (1984) |