August weather in Chelan, WA
The average temperature in Chelan in August is 72.5°F (58.1°F–87.0°F). Average precipitation: 0.32 inches.
August is a summer month in Chelan, and is warmer than the annual average of 50.1°F. Daily temperatures swing about 28.9°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 14h 6m. For travel, August is a comfortable month to visit.
Avg High
87.0°F
Avg Low
58.1°F
Precipitation
0.32 in
Daylight
14h 6m
August records in Chelan
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 102.9°F (2020) | 53.1°F (1964) | 0.25 in (2010) |
| August 2 | 100.9°F (1965) | 48.9°F (1964) | 0.35 in (2013) |
| August 3 | 102.0°F (1977) | 50.0°F (1983) | 0.24 in (1970) |
| August 4 | 106.0°F (2021) | 46.0°F (1983) | 0.35 in (2010) |
| August 5 | 105.1°F (1998) | 48.0°F (1964) | 0.35 in (2010) |
| August 6 | 100.9°F (2016) | 48.9°F (2015) | 0.05 in (1976) |
| August 7 | 100.0°F (2019) | 51.1°F (2002) | 0.52 in (1976) |
| August 8 | 102.9°F (2019) | 52.0°F (2016) | 0.08 in (1994) |
| August 9 | 102.0°F (1981) | 48.9°F (2016) | 0.24 in (2008) |
| August 10 | 100.0°F (1971) | 44.1°F (1985) | 0.18 in (2008) |
| August 11 | 102.0°F (2017) | 52.0°F (1966) | 0.88 in (1983) |
| August 12 | 105.1°F (2017) | 48.9°F (1983) | 0.17 in (1962) |
| August 13 | 105.1°F (1977) | 50.0°F (1983) | 0.81 in (2014) |
| August 14 | 102.9°F (1977) | 48.9°F (1982) | 0.70 in (2014) |
| August 15 | 104.0°F (2023) | 48.0°F (1982) | 0.52 in (1972) |
| August 16 | 104.0°F (2023) | 50.0°F (2023) | 0.61 in (1972) |
| August 17 | 99.0°F (1967) | 48.9°F (1978) | 0.12 in (1988) |
| August 18 | 102.9°F (2020) | 46.9°F (1973) | 0.17 in (1975) |
| August 19 | 99.0°F (1977) | 46.0°F (1973) | 1.49 in (1975) |
| August 20 | 100.9°F (1967) | 50.0°F (1968) | 0.50 in (2007) |
| August 21 | 97.0°F (1977) | 46.9°F (1976) | 0.64 in (1990) |
| August 22 | 100.0°F (1958) | 42.1°F (1960) | 0.27 in (1990) |
| August 23 | 100.0°F (1958) | 46.0°F (1960) | 0.72 in (1965) |
| August 24 | 100.0°F (1958) | 45.0°F (2021) | 0.16 in (2024) |
| August 25 | 102.9°F (2025) | 46.9°F (1980) | 0.45 in (1968) |
| August 26 | 102.9°F (2025) | 46.9°F (1976) | 0.55 in (1963) |
| August 27 | 97.0°F (2025) | 45.0°F (1960) | 0.56 in (1983) |
| August 28 | 98.1°F (2023) | 46.9°F (1968) | 0.14 in (1968) |
| August 29 | 97.0°F (2006) | 43.0°F (1980) | 0.09 in (1983) |
| August 30 | 95.0°F (2001) | 46.0°F (1965) | 0.42 in (2023) |
| August 31 | 97.0°F (1974) | 46.9°F (1965) | 0.46 in (1975) |