September weather in Corvallis, OR
The average temperature in Corvallis in September is 62.9°F (48.2°F–77.6°F). Average precipitation: 1.49 inches.
September is a fall month in Corvallis, and is warmer than the annual average of 52.9°F. Daily temperatures swing about 29.4°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
77.6°F
Avg Low
48.2°F
Precipitation
1.49 in
Daylight
12h 17m
September records in Corvallis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1987) | 35.1°F (1998) | 1.35 in (1941) |
| September 2 | 99.0°F (1934) | 37.0°F (1946) | 0.95 in (1979) |
| September 3 | 102.9°F (1988) | 37.9°F (1913) | 0.86 in (1979) |
| September 4 | 96.1°F (2017) | 39.0°F (2002) | 1.22 in (1911) |
| September 5 | 102.9°F (1944) | 37.0°F (1895) | 0.55 in (1913) |
| September 6 | 99.0°F (2024) | 37.0°F (1895) | 2.94 in (2013) |
| September 7 | 97.0°F (1958) | 37.0°F (1910) | 1.05 in (1900) |
| September 8 | 98.1°F (1944) | 36.0°F (1896) | 0.71 in (1917) |
| September 9 | 97.0°F (1944) | 34.0°F (1895) | 0.65 in (1949) |
| September 10 | 100.9°F (1944) | 36.0°F (1952) | 0.65 in (1978) |
| September 11 | 96.1°F (1922) | 36.0°F (1952) | 1.20 in (1895) |
| September 12 | 93.9°F (1922) | 34.0°F (1921) | 1.57 in (1906) |
| September 13 | 95.0°F (1951) | 33.1°F (1921) | 0.61 in (1958) |
| September 14 | 98.1°F (1937) | 33.1°F (1970) | 1.28 in (1935) |
| September 15 | 93.9°F (1957) | 34.0°F (1921) | 1.38 in (1946) |
| September 16 | 98.1°F (1967) | 35.1°F (1908) | 0.72 in (1955) |
| September 17 | 91.9°F (1918) | 33.1°F (1911) | 0.68 in (2015) |
| September 18 | 93.0°F (1991) | 34.0°F (1988) | 2.18 in (1969) |
| September 19 | 91.0°F (1991) | 34.0°F (1907) | 1.23 in (2010) |
| September 20 | 93.9°F (1974) | 36.0°F (1957) | 1.44 in (1977) |
| September 21 | 95.0°F (1947) | 30.0°F (1895) | 1.58 in (1944) |
| September 22 | 95.0°F (1947) | 28.9°F (1906) | 1.13 in (1898) |
| September 23 | 95.0°F (1943) | 35.1°F (1908) | 0.51 in (1972) |
| September 24 | 93.0°F (1943) | 27.0°F (1908) | 1.25 in (1924) |
| September 25 | 97.0°F (1974) | 30.0°F (1908) | 0.72 in (2023) |
| September 26 | 93.0°F (1991) | 32.0°F (1926) | 0.86 in (1911) |
| September 27 | 93.9°F (1967) | 32.0°F (1972) | 1.82 in (1981) |
| September 28 | 98.1°F (2003) | 32.0°F (1902) | 1.10 in (2021) |
| September 29 | 89.1°F (1932) | 34.0°F (1961) | 1.27 in (2013) |
| September 30 | 88.0°F (1987) | 32.0°F (1903) | 1.56 in (2013) |