September weather in Philomath, OR
The average temperature in Philomath in September is 59.9°F (42.3°F–77.4°F). Average precipitation: 1.75 inches.
September is a fall month in Philomath, and is warmer than the annual average of 49.8°F. Daily temperatures swing about 35.1°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
77.4°F
Avg Low
42.3°F
Precipitation
1.75 in
Daylight
12h 17m
September records in Philomath
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (2024) | 37.0°F (1973) | 1.89 in (1941) |
| September 2 | 98.1°F (2020) | 39.9°F (2018) | 1.15 in (1979) |
| September 3 | 100.9°F (2017) | 36.0°F (2016) | 1.35 in (1979) |
| September 4 | 99.0°F (2017) | 34.0°F (2018) | 2.41 in (1945) |
| September 5 | 95.0°F (2003) | 35.1°F (2015) | 0.75 in (1959) |
| September 6 | 99.0°F (2024) | 37.0°F (2015) | 1.43 in (2013) |
| September 7 | 96.1°F (2014) | 39.0°F (1992) | 0.82 in (1938) |
| September 8 | 95.0°F (1963) | 37.0°F (2009) | 0.40 in (1947) |
| September 9 | 95.0°F (1963) | 39.9°F (2009) | 0.98 in (1949) |
| September 10 | 93.9°F (1980) | 37.9°F (2008) | 0.78 in (1978) |
| September 11 | 96.1°F (2011) | 39.0°F (1985) | 1.15 in (1941) |
| September 12 | 93.0°F (2015) | 39.0°F (2016) | 1.02 in (1941) |
| September 13 | 93.0°F (2017) | 34.0°F (1970) | 0.88 in (1958) |
| September 14 | 91.0°F (2012) | 36.0°F (1970) | 0.80 in (1955) |
| September 15 | 91.0°F (1967) | 33.1°F (2016) | 1.24 in (1996) |
| September 16 | 96.1°F (1967) | 35.1°F (2016) | 0.67 in (1997) |
| September 17 | 91.9°F (2025) | 35.1°F (2017) | 1.08 in (1997) |
| September 18 | 89.1°F (1991) | 36.0°F (1988) | 1.08 in (1969) |
| September 19 | 89.1°F (1974) | 35.1°F (2016) | 1.39 in (2004) |
| September 20 | 90.0°F (1974) | 34.0°F (1993) | 1.01 in (1973) |
| September 21 | 91.0°F (1974) | 33.1°F (2017) | 0.94 in (1972) |
| September 22 | 93.0°F (1974) | 33.1°F (2017) | 0.62 in (1948) |
| September 23 | 91.0°F (2009) | 33.1°F (2017) | 0.81 in (1948) |
| September 24 | 91.0°F (1974) | 35.1°F (1984) | 1.06 in (1973) |
| September 25 | 93.9°F (1974) | 36.0°F (1972) | 1.02 in (2023) |
| September 26 | 87.1°F (1991) | 35.1°F (1972) | 1.03 in (2023) |
| September 27 | 93.0°F (2016) | 32.0°F (1972) | 2.25 in (1981) |
| September 28 | 88.0°F (1963) | 27.0°F (2019) | 1.07 in (1995) |
| September 29 | 88.0°F (2012) | 28.9°F (2019) | 2.86 in (2013) |
| September 30 | 84.0°F (2006) | 30.0°F (2019) | 3.76 in (2013) |