September weather in Wilsonville, OR
The average temperature in Wilsonville in September is 63.8°F (51.3°F–76.2°F). Average precipitation: 1.73 inches.
September is a fall month in Wilsonville, and is warmer than the annual average of 53.9°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
76.2°F
Avg Low
51.3°F
Precipitation
1.73 in
Daylight
12h 18m
September records in Wilsonville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (1987) | 36.0°F (1973) | 1.31 in (1971) |
| September 2 | 98.1°F (1988) | 42.1°F (1994) | 0.91 in (1979) |
| September 3 | 105.1°F (1988) | 43.0°F (1994) | 1.08 in (1979) |
| September 4 | 93.9°F (2003) | 41.0°F (1965) | 0.55 in (1978) |
| September 5 | 95.0°F (1973) | 37.9°F (1969) | 0.23 in (1978) |
| September 6 | 93.0°F (1987) | 41.0°F (1992) | 1.11 in (1984) |
| September 7 | 93.0°F (1981) | 39.9°F (1992) | 0.52 in (1973) |
| September 8 | 100.0°F (1981) | 39.0°F (1992) | 0.33 in (1979) |
| September 9 | 91.9°F (1993) | 41.0°F (1964) | 0.68 in (1983) |
| September 10 | 91.9°F (1963) | 39.0°F (1964) | 0.85 in (1982) |
| September 11 | 93.9°F (1973) | 37.0°F (1986) | 0.30 in (1966) |
| September 12 | 91.9°F (1975) | 37.9°F (1967) | 0.10 in (1980) |
| September 13 | 93.9°F (1999) | 35.1°F (1970) | 0.45 in (1980) |
| September 14 | 93.0°F (1979) | 36.0°F (1970) | 0.47 in (1997) |
| September 15 | 91.9°F (1995) | 34.0°F (1970) | 1.35 in (1996) |
| September 16 | 98.1°F (1967) | 39.0°F (1978) | 1.14 in (2002) |
| September 17 | 91.0°F (1994) | 33.1°F (1965) | 1.07 in (1964) |
| September 18 | 91.9°F (1991) | 36.0°F (1988) | 1.53 in (1969) |
| September 19 | 93.0°F (1999) | 36.0°F (1965) | 0.66 in (1988) |
| September 20 | 91.9°F (1974) | 37.9°F (1965) | 1.04 in (1982) |
| September 21 | 96.1°F (1974) | 37.0°F (1993) | 0.67 in (1972) |
| September 22 | 95.0°F (1974) | 37.9°F (1993) | 0.46 in (1981) |
| September 23 | 95.0°F (1989) | 37.0°F (1981) | 0.59 in (1969) |
| September 24 | 93.9°F (1974) | 32.0°F (1970) | 1.06 in (1992) |
| September 25 | 97.0°F (1974) | 37.9°F (1970) | 0.45 in (2001) |
| September 26 | 95.0°F (1991) | 33.1°F (1972) | 0.38 in (1966) |
| September 27 | 97.0°F (2003) | 30.0°F (1972) | 1.05 in (1981) |
| September 28 | 91.0°F (1967) | 30.0°F (1972) | 0.32 in (1971) |
| September 29 | 89.1°F (1989) | 37.9°F (1972) | 0.60 in (1971) |
| September 30 | 90.0°F (1993) | 35.1°F (1971) | 2.04 in (2005) |