September weather in Port Republic, NJ
The average temperature in Port Republic in September is 68.4°F (58.2°F–78.5°F). Average precipitation: 3.55 inches.
September is a fall month in Port Republic, and is warmer than the annual average of 55.1°F. Daily temperatures swing about 20.3°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
78.5°F
Avg Low
58.2°F
Precipitation
3.55 in
Daylight
12h 15m
September records in Port Republic
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (2010) | 46.9°F (1991) | 2.18 in (2006) |
| September 2 | 93.9°F (1980) | 44.1°F (1991) | 1.96 in (2017) |
| September 3 | 95.0°F (1961) | 39.0°F (1967) | 1.18 in (2012) |
| September 4 | 96.1°F (2018) | 48.0°F (1976) | 1.85 in (1988) |
| September 5 | 93.9°F (2023) | 44.1°F (1994) | 1.25 in (2008) |
| September 6 | 98.1°F (1983) | 44.1°F (1988) | 2.86 in (2022) |
| September 7 | 93.9°F (1983) | 41.0°F (1976) | 0.72 in (1974) |
| September 8 | 93.0°F (1985) | 43.0°F (1988) | 1.10 in (1969) |
| September 9 | 97.0°F (2016) | 43.0°F (1986) | 1.84 in (2018) |
| September 10 | 95.0°F (1983) | 37.9°F (1975) | 3.97 in (2020) |
| September 11 | 99.0°F (1983) | 41.0°F (1967) | 3.15 in (2009) |
| September 12 | 93.9°F (1961) | 37.9°F (1967) | 3.06 in (1960) |
| September 13 | 93.0°F (2005) | 39.0°F (1967) | 1.31 in (1971) |
| September 14 | 91.9°F (1981) | 37.0°F (1975) | 3.86 in (1973) |
| September 15 | 89.1°F (2005) | 39.0°F (1975) | 2.07 in (2006) |
| September 16 | 93.0°F (1991) | 42.1°F (1988) | 2.43 in (1999) |
| September 17 | 93.0°F (1991) | 39.9°F (1986) | 2.17 in (1995) |
| September 18 | 89.1°F (1965) | 36.0°F (1990) | 2.13 in (2018) |
| September 19 | 91.0°F (1965) | 39.9°F (1959) | 2.70 in (1989) |
| September 20 | 89.1°F (1983) | 34.0°F (1979) | 1.59 in (1961) |
| September 21 | 87.1°F (1965) | 37.0°F (1962) | 2.63 in (1966) |
| September 22 | 93.9°F (1980) | 37.9°F (1991) | 2.41 in (1994) |
| September 23 | 93.0°F (1970) | 36.0°F (1967) | 3.67 in (2023) |
| September 24 | 93.0°F (2010) | 32.0°F (1967) | 1.30 in (1975) |
| September 25 | 91.0°F (1970) | 36.0°F (1967) | 2.49 in (1992) |
| September 26 | 90.0°F (1970) | 36.0°F (1967) | 1.35 in (1989) |
| September 27 | 93.0°F (1998) | 36.0°F (1978) | 2.37 in (1958) |
| September 28 | 82.9°F (1998) | 35.1°F (1965) | 1.43 in (2004) |
| September 29 | 84.9°F (2015) | 36.0°F (1969) | 1.57 in (1964) |
| September 30 | 88.0°F (1986) | 32.0°F (1969) | 1.76 in (1964) |