September weather in Sweet Home, OR
The average temperature in Sweet Home in September is 61.6°F (46.8°F–76.4°F). Average precipitation: 1.99 inches.
September is a fall month in Sweet Home, and is warmer than the annual average of 52.4°F. Daily temperatures swing about 29.6°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
76.4°F
Avg Low
46.8°F
Precipitation
1.99 in
Daylight
12h 17m
September records in Sweet Home
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1987) | 36.0°F (2006) | 1.36 in (1971) |
| September 2 | 97.0°F (1988) | 39.9°F (1973) | 0.78 in (1971) |
| September 3 | 100.9°F (1988) | 39.0°F (2008) | 0.84 in (1979) |
| September 4 | 97.0°F (2003) | 41.0°F (1975) | 0.35 in (1970) |
| September 5 | 97.0°F (2003) | 41.0°F (1975) | 0.48 in (1978) |
| September 6 | 96.1°F (2024) | 39.9°F (2001) | 2.66 in (2013) |
| September 7 | 93.9°F (2014) | 37.9°F (2010) | 0.53 in (1973) |
| September 8 | 96.1°F (1981) | 39.0°F (1976) | 0.54 in (2003) |
| September 9 | 95.0°F (2011) | 37.9°F (1970) | 0.40 in (2019) |
| September 10 | 93.0°F (2022) | 30.9°F (2007) | 0.84 in (1978) |
| September 11 | 95.0°F (2007) | 36.0°F (2012) | 0.85 in (2019) |
| September 12 | 93.9°F (2011) | 35.1°F (2012) | 0.72 in (2024) |
| September 13 | 93.9°F (1999) | 33.1°F (1970) | 0.58 in (1985) |
| September 14 | 93.9°F (1989) | 33.1°F (1970) | 0.41 in (1997) |
| September 15 | 91.0°F (1979) | 35.1°F (1992) | 1.57 in (1996) |
| September 16 | 96.1°F (1981) | 36.0°F (1982) | 1.09 in (2019) |
| September 17 | 93.0°F (2025) | 36.0°F (2021) | 0.65 in (2019) |
| September 18 | 93.0°F (1991) | 37.9°F (1987) | 1.05 in (2019) |
| September 19 | 91.0°F (1991) | 39.0°F (1983) | 1.65 in (2021) |
| September 20 | 89.1°F (1974) | 35.1°F (1983) | 1.23 in (2017) |
| September 21 | 91.9°F (1974) | 34.0°F (1983) | 0.88 in (1970) |
| September 22 | 95.0°F (1994) | 32.0°F (1993) | 1.00 in (1972) |
| September 23 | 93.0°F (1989) | 32.0°F (1993) | 0.72 in (1973) |
| September 24 | 91.0°F (1989) | 33.1°F (2000) | 1.17 in (1977) |
| September 25 | 97.0°F (1991) | 33.1°F (2007) | 0.75 in (2013) |
| September 26 | 93.9°F (1991) | 35.1°F (2007) | 0.82 in (1986) |
| September 27 | 90.0°F (2016) | 33.1°F (1999) | 1.34 in (1981) |
| September 28 | 95.0°F (2003) | 32.0°F (1999) | 1.57 in (2021) |
| September 29 | 87.1°F (2012) | 32.0°F (1983) | 1.26 in (2013) |
| September 30 | 88.0°F (2020) | 32.0°F (1983) | 0.66 in (2009) |