September weather in Jefferson, OR
The average temperature in Jefferson in September is 62.4°F (49.4°F–75.4°F). Average precipitation: 2.02 inches.
September is a fall month in Jefferson, and is warmer than the annual average of 52.8°F. Daily temperatures swing about 26°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
75.4°F
Avg Low
49.4°F
Precipitation
2.02 in
Daylight
12h 18m
September records in Jefferson
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1952) | 37.9°F (1973) | 0.95 in (1971) |
| September 2 | 98.1°F (1988) | 39.0°F (1956) | 1.02 in (1979) |
| September 3 | 100.9°F (1988) | 37.9°F (1956) | 0.63 in (2000) |
| September 4 | 102.0°F (1955) | 37.9°F (1956) | 1.47 in (1979) |
| September 5 | 98.1°F (1955) | 39.0°F (1969) | 0.53 in (2009) |
| September 6 | 97.0°F (1958) | 39.9°F (1960) | 2.08 in (2013) |
| September 7 | 100.0°F (1958) | 39.9°F (1960) | 0.84 in (1973) |
| September 8 | 97.0°F (1981) | 39.0°F (1976) | 0.40 in (2010) |
| September 9 | 93.9°F (1963) | 37.0°F (1970) | 0.86 in (1982) |
| September 10 | 96.1°F (2022) | 37.0°F (1952) | 1.70 in (1978) |
| September 11 | 93.9°F (1975) | 41.0°F (1986) | 0.43 in (2019) |
| September 12 | 93.0°F (1975) | 41.0°F (1967) | 0.36 in (1954) |
| September 13 | 98.1°F (1999) | 30.9°F (1970) | 0.86 in (1955) |
| September 14 | 93.9°F (1957) | 37.9°F (1952) | 0.84 in (1968) |
| September 15 | 98.1°F (1967) | 35.1°F (1969) | 1.91 in (1996) |
| September 16 | 93.0°F (1967) | 37.9°F (1982) | 1.34 in (1997) |
| September 17 | 93.0°F (1962) | 21.0°F (2008) | 0.94 in (1997) |
| September 18 | 93.0°F (1962) | 35.1°F (1965) | 1.40 in (1969) |
| September 19 | 93.9°F (1974) | 35.1°F (1983) | 1.05 in (2017) |
| September 20 | 98.1°F (1952) | 36.0°F (1983) | 1.60 in (1970) |
| September 21 | 98.1°F (1952) | 36.0°F (1960) | 1.20 in (1972) |
| September 22 | 96.1°F (1952) | 34.0°F (1955) | 0.42 in (1973) |
| September 23 | 91.9°F (1990) | 35.1°F (1956) | 1.05 in (1977) |
| September 24 | 98.1°F (1974) | 34.0°F (1961) | 1.30 in (2014) |
| September 25 | 95.0°F (1974) | 37.0°F (1972) | 0.70 in (2013) |
| September 26 | 96.1°F (1967) | 34.0°F (1961) | 0.61 in (1986) |
| September 27 | 95.0°F (1967) | 32.0°F (1972) | 1.39 in (1955) |
| September 28 | 97.0°F (2003) | 32.0°F (1959) | 1.06 in (2021) |
| September 29 | 86.0°F (1960) | 32.0°F (1959) | 1.50 in (2013) |
| September 30 | 87.1°F (1966) | 30.0°F (1954) | 1.30 in (2013) |