September weather in Princeton, MN
The average temperature in Princeton in September is 60.2°F (48.7°F–71.6°F). Average precipitation: 2.90 inches.
September is a fall month in Princeton, and is warmer than the annual average of 43.7°F. Daily temperatures swing about 22.9°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
71.6°F
Avg Low
48.7°F
Precipitation
2.90 in
Daylight
12h 18m
September records in Princeton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (1961) | 28.9°F (1974) | 1.83 in (1982) |
| September 2 | 95.0°F (1961) | 34.0°F (1994) | 2.75 in (2008) |
| September 3 | 93.9°F (2023) | 28.0°F (1974) | 2.11 in (2014) |
| September 4 | 93.9°F (2023) | 30.0°F (1974) | 1.67 in (1980) |
| September 5 | 90.0°F (2007) | 32.0°F (1974) | 1.70 in (2016) |
| September 6 | 91.0°F (2013) | 30.0°F (1988) | 2.30 in (2004) |
| September 7 | 97.0°F (1978) | 36.0°F (1986) | 1.53 in (2001) |
| September 8 | 93.0°F (1978) | 33.1°F (1995) | 1.90 in (1991) |
| September 9 | 90.0°F (1978) | 30.9°F (2020) | 3.20 in (1985) |
| September 10 | 90.0°F (1978) | 30.9°F (2020) | 1.32 in (1983) |
| September 11 | 93.0°F (2012) | 30.9°F (2020) | 1.23 in (1980) |
| September 12 | 89.1°F (1976) | 30.0°F (2007) | 1.65 in (1978) |
| September 13 | 89.1°F (1976) | 28.9°F (1989) | 1.82 in (2005) |
| September 14 | 87.1°F (1998) | 30.0°F (1996) | 1.17 in (2021) |
| September 15 | 89.1°F (2018) | 25.0°F (2007) | 1.00 in (2004) |
| September 16 | 90.0°F (2025) | 32.0°F (1971) | 1.68 in (1962) |
| September 17 | 86.0°F (1998) | 28.0°F (1981) | 2.00 in (1986) |
| September 18 | 89.1°F (2000) | 25.0°F (1993) | 2.00 in (2007) |
| September 19 | 91.0°F (1984) | 28.0°F (1971) | 0.80 in (1986) |
| September 20 | 82.9°F (2005) | 23.0°F (1991) | 1.54 in (1993) |
| September 21 | 84.0°F (1984) | 26.1°F (1982) | 1.95 in (2004) |
| September 22 | 87.1°F (2017) | 18.0°F (1974) | 2.55 in (1968) |
| September 23 | 84.0°F (2007) | 23.0°F (1976) | 2.10 in (1968) |
| September 24 | 87.1°F (2017) | 25.0°F (1976) | 2.33 in (2023) |
| September 25 | 84.9°F (1990) | 28.0°F (1985) | 0.67 in (2017) |
| September 26 | 84.9°F (1986) | 21.0°F (1980) | 0.97 in (1973) |
| September 27 | 88.0°F (1983) | 21.9°F (1991) | 0.17 in (2020) |
| September 28 | 84.0°F (1983) | 19.9°F (1981) | 0.65 in (1980) |
| September 29 | 84.9°F (2025) | 21.9°F (1992) | 0.75 in (1965) |
| September 30 | 84.9°F (1976) | 25.0°F (1972) | 1.50 in (1965) |