September weather in Grants Pass, OR
The average temperature in Grants Pass in September is 66.1°F (48.3°F–83.9°F). Average precipitation: 0.56 inches.
September is a fall month in Grants Pass, and is warmer than the annual average of 55.6°F. Daily temperatures swing about 35.6°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
83.9°F
Avg Low
48.3°F
Precipitation
0.56 in
Daylight
12h 16m
September records in Grants Pass
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 107.1°F (1988) | 37.0°F (1912) | 0.52 in (1901) |
| September 2 | 108.0°F (1988) | 36.0°F (1907) | 0.44 in (1941) |
| September 3 | 105.1°F (1988) | 35.1°F (1894) | 0.49 in (1913) |
| September 4 | 107.1°F (1988) | 35.1°F (1894) | 0.61 in (1919) |
| September 5 | 102.0°F (1988) | 36.0°F (1996) | 0.87 in (1978) |
| September 6 | 104.0°F (2024) | 32.0°F (1895) | 0.26 in (1978) |
| September 7 | 104.0°F (2022) | 32.0°F (1910) | 0.76 in (1940) |
| September 8 | 104.0°F (2020) | 32.0°F (1910) | 0.78 in (1942) |
| September 9 | 102.9°F (1902) | 34.0°F (1897) | 0.60 in (1978) |
| September 10 | 104.0°F (1922) | 32.0°F (1896) | 0.66 in (1997) |
| September 11 | 104.0°F (1922) | 33.1°F (1906) | 2.05 in (1895) |
| September 12 | 105.1°F (2015) | 33.1°F (1914) | 0.49 in (1906) |
| September 13 | 100.0°F (2014) | 32.0°F (1896) | 0.55 in (1918) |
| September 14 | 100.0°F (1937) | 30.0°F (1970) | 0.65 in (1918) |
| September 15 | 98.1°F (1989) | 30.9°F (1936) | 0.48 in (1896) |
| September 16 | 100.0°F (2023) | 33.1°F (1936) | 1.00 in (1914) |
| September 17 | 98.1°F (1927) | 28.9°F (1908) | 0.55 in (1989) |
| September 18 | 99.0°F (1991) | 30.9°F (1908) | 1.46 in (1966) |
| September 19 | 100.0°F (1991) | 32.0°F (1908) | 1.35 in (2010) |
| September 20 | 96.1°F (1952) | 27.0°F (1907) | 0.65 in (1984) |
| September 21 | 100.0°F (1928) | 28.9°F (1993) | 0.55 in (1901) |
| September 22 | 105.1°F (1928) | 30.0°F (1929) | 1.05 in (1901) |
| September 23 | 100.0°F (1928) | 30.0°F (1913) | 0.88 in (1934) |
| September 24 | 97.0°F (1928) | 30.0°F (1908) | 0.47 in (1920) |
| September 25 | 100.0°F (2024) | 24.1°F (1908) | 1.10 in (1923) |
| September 26 | 99.0°F (1991) | 27.0°F (1926) | 1.08 in (2023) |
| September 27 | 99.0°F (2003) | 28.0°F (1929) | 1.50 in (1957) |
| September 28 | 98.1°F (1967) | 27.0°F (1902) | 2.86 in (1977) |
| September 29 | 100.0°F (2020) | 27.0°F (1902) | 1.02 in (2013) |
| September 30 | 96.1°F (1988) | 28.0°F (1950) | 0.68 in (2013) |