September weather in Washougal, WA
The average temperature in Washougal in September is 63.2°F (51.3°F–75.2°F). Average precipitation: 1.86 inches.
September is a fall month in Washougal, and is warmer than the annual average of 53.4°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
75.2°F
Avg Low
51.3°F
Precipitation
1.86 in
Daylight
12h 18m
September records in Washougal
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1987) | 37.0°F (1989) | 1.14 in (1971) |
| September 2 | 100.0°F (1998) | 37.9°F (1989) | 0.66 in (1980) |
| September 3 | 100.0°F (1988) | 42.1°F (1987) | 0.64 in (1979) |
| September 4 | 97.0°F (2017) | 36.0°F (1989) | 0.48 in (1949) |
| September 5 | 96.1°F (1973) | 34.0°F (1989) | 0.38 in (2009) |
| September 6 | 99.0°F (1968) | 32.0°F (1989) | 1.43 in (2013) |
| September 7 | 93.9°F (1986) | 37.9°F (1992) | 0.89 in (1973) |
| September 8 | 95.0°F (1981) | 41.0°F (1960) | 0.82 in (2003) |
| September 9 | 93.0°F (1993) | 39.0°F (2006) | 0.43 in (2003) |
| September 10 | 91.9°F (1948) | 41.0°F (1952) | 1.26 in (1985) |
| September 11 | 95.0°F (1973) | 39.0°F (1988) | 0.86 in (1978) |
| September 12 | 93.9°F (2013) | 41.0°F (2012) | 0.93 in (2024) |
| September 13 | 91.9°F (2017) | 35.1°F (1970) | 0.40 in (1985) |
| September 14 | 93.9°F (1998) | 37.9°F (1970) | 0.49 in (2025) |
| September 15 | 90.0°F (1951) | 36.0°F (1989) | 0.74 in (1949) |
| September 16 | 93.0°F (1981) | 37.0°F (1989) | 2.10 in (1996) |
| September 17 | 91.0°F (1951) | 30.9°F (1965) | 0.65 in (2019) |
| September 18 | 91.0°F (1951) | 37.0°F (1988) | 2.20 in (1969) |
| September 19 | 91.0°F (1991) | 36.0°F (1989) | 1.07 in (1988) |
| September 20 | 93.9°F (1952) | 37.9°F (1989) | 1.01 in (2017) |
| September 21 | 93.9°F (1952) | 35.1°F (2005) | 0.61 in (2017) |
| September 22 | 91.0°F (1952) | 36.0°F (1960) | 1.28 in (1981) |
| September 23 | 93.9°F (1987) | 37.0°F (2005) | 0.94 in (1972) |
| September 24 | 91.0°F (1974) | 36.0°F (2005) | 1.26 in (2020) |
| September 25 | 91.9°F (1991) | 34.0°F (2005) | 0.87 in (1951) |
| September 26 | 91.0°F (1991) | 35.1°F (2005) | 1.20 in (1948) |
| September 27 | 91.0°F (1967) | 36.0°F (1972) | 0.80 in (1981) |
| September 28 | 93.9°F (1967) | 35.1°F (1983) | 0.99 in (2021) |
| September 29 | 88.0°F (1967) | 28.0°F (1972) | 0.74 in (2007) |
| September 30 | 90.0°F (1993) | 35.1°F (1950) | 1.46 in (1951) |