September weather in Harrisburg, OR
The average temperature in Harrisburg in September is 62.9°F (47.8°F–78.0°F). Average precipitation: 1.39 inches.
September is a fall month in Harrisburg, and is warmer than the annual average of 53.1°F. Daily temperatures swing about 30.2°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
78.0°F
Avg Low
47.8°F
Precipitation
1.39 in
Daylight
12h 17m
September records in Harrisburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1988) | 39.0°F (1973) | 1.32 in (1979) |
| September 2 | 102.9°F (1988) | 37.9°F (1999) | 0.72 in (1979) |
| September 3 | 96.1°F (1949) | 39.0°F (2008) | 0.56 in (1960) |
| September 4 | 97.0°F (1955) | 39.9°F (1980) | 0.43 in (1996) |
| September 5 | 100.9°F (1944) | 39.0°F (2015) | 0.74 in (2009) |
| September 6 | 95.0°F (1958) | 37.9°F (1996) | 0.70 in (2016) |
| September 7 | 98.1°F (1958) | 37.9°F (1939) | 0.89 in (1938) |
| September 8 | 97.0°F (1948) | 39.9°F (1961) | 0.59 in (1952) |
| September 9 | 97.0°F (1948) | 39.0°F (1962) | 0.85 in (1978) |
| September 10 | 98.1°F (1948) | 37.9°F (1964) | 0.71 in (2019) |
| September 11 | 96.1°F (1975) | 39.0°F (1972) | 0.50 in (2024) |
| September 12 | 96.1°F (1975) | 39.9°F (1949) | 1.17 in (1985) |
| September 13 | 96.1°F (1989) | 37.0°F (1970) | 0.68 in (1968) |
| September 14 | 95.0°F (1967) | 33.1°F (1970) | 1.27 in (1996) |
| September 15 | 96.1°F (1967) | 36.0°F (1969) | 1.17 in (1963) |
| September 16 | 93.0°F (2025) | 36.0°F (1960) | 1.01 in (1946) |
| September 17 | 93.0°F (1951) | 34.0°F (1965) | 1.02 in (1969) |
| September 18 | 93.9°F (1938) | 34.0°F (1988) | 1.48 in (2021) |
| September 19 | 93.0°F (1974) | 35.1°F (1947) | 0.72 in (1977) |
| September 20 | 93.9°F (1952) | 35.1°F (1947) | 0.51 in (1970) |
| September 21 | 95.0°F (1974) | 34.0°F (1955) | 1.12 in (1972) |
| September 22 | 95.0°F (1989) | 34.0°F (1961) | 0.75 in (1948) |
| September 23 | 96.1°F (1943) | 30.9°F (2000) | 0.99 in (1948) |
| September 24 | 96.1°F (1974) | 32.0°F (2000) | 0.73 in (2014) |
| September 25 | 93.0°F (1991) | 33.1°F (2007) | 0.85 in (1986) |
| September 26 | 93.0°F (1949) | 33.1°F (1951) | 1.34 in (1981) |
| September 27 | 97.0°F (2003) | 32.0°F (1972) | 0.71 in (1940) |
| September 28 | 88.0°F (2018) | 30.9°F (1999) | 1.22 in (1962) |
| September 29 | 87.1°F (1993) | 33.1°F (1950) | 1.90 in (2013) |
| September 30 | 88.0°F (1975) | 32.0°F (1983) | 1.18 in (2007) |