September weather in Seneca, OR
The average temperature in Seneca in September is 50.3°F (27.3°F–73.4°F). Average precipitation: 0.53 inches.
September is a fall month in Seneca, and is warmer than the annual average of 40.5°F. Daily temperatures swing about 46.1°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 17m. For travel, September is cool.
Avg High
73.4°F
Avg Low
27.3°F
Precipitation
0.53 in
Daylight
12h 17m
September records in Seneca
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (1950) | 19.0°F (1999) | 0.63 in (1983) |
| September 2 | 96.1°F (1950) | 19.0°F (1999) | 0.32 in (1961) |
| September 3 | 96.1°F (1998) | 17.1°F (1932) | 0.18 in (2000) |
| September 4 | 95.0°F (1988) | 15.1°F (1956) | 0.82 in (1940) |
| September 5 | 96.1°F (1955) | 16.0°F (1969) | 0.46 in (2013) |
| September 6 | 95.0°F (1957) | 15.1°F (1992) | 0.75 in (1960) |
| September 7 | 100.0°F (2020) | 12.0°F (1936) | 0.28 in (1998) |
| September 8 | 89.1°F (1963) | 15.1°F (1931) | 0.96 in (1998) |
| September 9 | 88.0°F (1963) | 9.0°F (1944) | 0.80 in (1940) |
| September 10 | 89.1°F (1935) | 9.0°F (1931) | 0.24 in (2003) |
| September 11 | 90.0°F (1953) | 10.9°F (1931) | 0.60 in (2000) |
| September 12 | 90.0°F (2009) | 10.9°F (1949) | 0.77 in (1972) |
| September 13 | 91.9°F (2009) | 9.0°F (1949) | 0.59 in (1963) |
| September 14 | 91.9°F (2020) | 6.1°F (1970) | 0.79 in (1955) |
| September 15 | 90.0°F (1951) | 7.0°F (1936) | 0.93 in (1959) |
| September 16 | 91.0°F (1995) | 9.0°F (1965) | 0.49 in (1910) |
| September 17 | 90.0°F (1935) | 10.0°F (1971) | 0.40 in (2001) |
| September 18 | 91.0°F (1935) | 8.1°F (1971) | 0.62 in (1940) |
| September 19 | 87.1°F (1935) | 10.0°F (1971) | 1.67 in (1937) |
| September 20 | 89.1°F (1984) | 10.0°F (1983) | 0.74 in (1982) |
| September 21 | 86.0°F (2012) | 10.0°F (1993) | 0.27 in (1984) |
| September 22 | 87.1°F (1952) | 9.0°F (1995) | 0.14 in (1976) |
| September 23 | 88.0°F (1987) | 9.0°F (1931) | 0.41 in (1959) |
| September 24 | 91.9°F (2009) | 7.0°F (1961) | 0.18 in (1986) |
| September 25 | 90.0°F (2009) | 6.1°F (1970) | 0.55 in (1959) |
| September 26 | 88.0°F (2009) | 6.1°F (1934) | 0.26 in (2001) |
| September 27 | 87.1°F (1963) | 10.0°F (1934) | 0.19 in (1988) |
| September 28 | 87.1°F (2010) | 1.0°F (1931) | 0.40 in (1911) |
| September 29 | 86.0°F (1967) | 8.1°F (1985) | 0.42 in (1949) |
| September 30 | 95.0°F (2020) | 5.0°F (1954) | 1.11 in (2013) |