September weather in Forks, WA
The average temperature in Forks in September is 58.8°F (47.4°F–70.1°F). Average precipitation: 4.77 inches.
September is a fall month in Forks, and is warmer than the annual average of 50.4°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
70.1°F
Avg Low
47.4°F
Precipitation
4.77 in
Daylight
12h 20m
September records in Forks
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1987) | 36.0°F (1919) | 2.36 in (1980) |
| September 2 | 100.0°F (1988) | 36.0°F (1919) | 1.95 in (1948) |
| September 3 | 100.0°F (1988) | 37.9°F (1960) | 2.41 in (1913) |
| September 4 | 91.0°F (1955) | 37.9°F (1952) | 2.75 in (1945) |
| September 5 | 96.1°F (2024) | 39.0°F (1947) | 2.15 in (1931) |
| September 6 | 93.9°F (2024) | 37.0°F (1960) | 1.75 in (1957) |
| September 7 | 96.1°F (1981) | 36.0°F (1960) | 1.25 in (1959) |
| September 8 | 93.0°F (1981) | 37.0°F (1922) | 1.63 in (1992) |
| September 9 | 91.9°F (2020) | 35.1°F (1921) | 2.63 in (1978) |
| September 10 | 93.0°F (2020) | 35.1°F (1921) | 2.42 in (1967) |
| September 11 | 90.0°F (2020) | 32.0°F (1921) | 4.45 in (1920) |
| September 12 | 93.0°F (1924) | 30.9°F (1921) | 1.47 in (2019) |
| September 13 | 90.0°F (1979) | 30.0°F (1970) | 1.33 in (1920) |
| September 14 | 93.0°F (1937) | 33.1°F (1921) | 1.67 in (1996) |
| September 15 | 96.1°F (1981) | 32.0°F (1921) | 2.40 in (1939) |
| September 16 | 87.1°F (2025) | 35.1°F (1936) | 1.22 in (1958) |
| September 17 | 84.9°F (1979) | 35.1°F (1965) | 3.17 in (1997) |
| September 18 | 84.0°F (1979) | 34.0°F (1947) | 2.45 in (2021) |
| September 19 | 86.0°F (1910) | 32.0°F (1947) | 2.10 in (1959) |
| September 20 | 91.0°F (1974) | 34.0°F (1968) | 3.50 in (1921) |
| September 21 | 90.0°F (1952) | 34.0°F (1955) | 4.03 in (1924) |
| September 22 | 90.0°F (1974) | 34.0°F (1918) | 2.42 in (1969) |
| September 23 | 93.0°F (1974) | 30.0°F (1926) | 2.77 in (2020) |
| September 24 | 95.0°F (1974) | 24.1°F (1926) | 1.83 in (1922) |
| September 25 | 87.1°F (1991) | 30.9°F (1918) | 4.15 in (1921) |
| September 26 | 86.0°F (1949) | 33.1°F (1926) | 3.21 in (2010) |
| September 27 | 88.0°F (1918) | 27.0°F (1972) | 2.30 in (1981) |
| September 28 | 84.0°F (1932) | 24.1°F (1919) | 2.12 in (1933) |
| September 29 | 88.0°F (2020) | 28.9°F (1919) | 3.81 in (2005) |
| September 30 | 88.0°F (1987) | 30.9°F (1950) | 3.54 in (2007) |