August weather in St. John, WA
The average temperature in St. John in August is 68.4°F (53.3°F–83.5°F). Average precipitation: 0.34 inches.
August is a summer month in St. John, and is warmer than the annual average of 49.3°F. Daily temperatures swing about 30.2°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 14h 2m. For travel, August is a comfortable month to visit.
Avg High
83.5°F
Avg Low
53.3°F
Precipitation
0.34 in
Daylight
14h 2m
August records in St. John
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.0°F (1965) | 39.0°F (2002) | 0.71 in (1964) |
| August 2 | 100.0°F (1971) | 37.0°F (1987) | 0.42 in (2013) |
| August 3 | 100.9°F (1994) | 37.0°F (2002) | 0.23 in (2003) |
| August 4 | 102.9°F (1998) | 34.0°F (1980) | 0.01 in (2001) |
| August 5 | 102.9°F (1998) | 41.0°F (1981) | 0.16 in (1976) |
| August 6 | 98.1°F (1972) | 36.0°F (1980) | 0.46 in (1991) |
| August 7 | 100.9°F (1972) | 35.1°F (1980) | 0.44 in (2009) |
| August 8 | 102.9°F (1972) | 37.9°F (1968) | 0.11 in (2008) |
| August 9 | 108.0°F (2018) | 35.1°F (1980) | 0.18 in (1989) |
| August 10 | 100.9°F (2018) | 37.9°F (1970) | 0.22 in (1985) |
| August 11 | 99.0°F (1971) | 33.1°F (1985) | 0.12 in (1983) |
| August 12 | 100.9°F (2001) | 37.9°F (2000) | 0.79 in (1978) |
| August 13 | 100.9°F (2001) | 39.9°F (1975) | 0.09 in (1987) |
| August 14 | 100.9°F (2004) | 39.0°F (1995) | 0.58 in (1968) |
| August 15 | 99.0°F (1981) | 39.0°F (1971) | 0.57 in (1978) |
| August 16 | 100.0°F (1967) | 37.0°F (1974) | 0.53 in (1972) |
| August 17 | 102.9°F (2008) | 34.0°F (1969) | 0.40 in (2005) |
| August 18 | 98.1°F (1967) | 36.0°F (1985) | 0.45 in (1975) |
| August 19 | 98.1°F (2012) | 35.1°F (1973) | 0.53 in (1979) |
| August 20 | 98.1°F (2009) | 36.0°F (1984) | 0.35 in (2008) |
| August 21 | 100.0°F (2006) | 35.1°F (1980) | 0.32 in (1990) |
| August 22 | 97.0°F (1970) | 26.1°F (1985) | 0.48 in (2004) |
| August 23 | 100.0°F (1970) | 28.9°F (1992) | 0.77 in (1975) |
| August 24 | 102.9°F (1966) | 32.0°F (1992) | 0.80 in (1977) |
| August 25 | 100.0°F (1966) | 32.0°F (1980) | 0.56 in (1976) |
| August 26 | 98.1°F (1996) | 28.0°F (1980) | 0.89 in (1977) |
| August 27 | 99.0°F (1996) | 33.1°F (1978) | 0.15 in (1968) |
| August 28 | 98.1°F (2009) | 30.9°F (1981) | 0.40 in (1964) |
| August 29 | 100.0°F (2017) | 26.1°F (1980) | 0.14 in (1966) |
| August 30 | 98.1°F (1967) | 28.0°F (1980) | 0.36 in (1999) |
| August 31 | 102.0°F (1967) | 32.0°F (1966) | 0.91 in (1971) |