September weather in Hackettstown, NJ
The average temperature in Hackettstown in September is °F (°F–°F). Average precipitation: 4.94 inches.
September is a fall month in Hackettstown, and is cooler than the annual average of 0°F. Expect about 9 days with precipitation. Daylight averages about 12h 15m.
Avg High
°F
Avg Low
°F
Precipitation
4.94 in
Daylight
12h 15m
September records in Hackettstown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 82.9°F (2012) | 59.0°F (2011) | 2.03 in (2003) |
| September 2 | 82.9°F (2012) | 60.1°F (2011) | 0.85 in (1974) |
| September 3 | 86.0°F (2014) | 60.1°F (2011) | 1.42 in (1972) |
| September 4 | 80.1°F (2014) | 59.0°F (2013) | 2.30 in (1969) |
| September 5 | 82.0°F (2014) | 59.0°F (2013) | 2.17 in (1988) |
| September 6 | 81.0°F (2014) | 52.0°F (2013) | 3.45 in (1979) |
| September 7 | 84.9°F (2014) | 48.9°F (2013) | 3.10 in (2008) |
| September 8 | 81.0°F (2012) | 48.9°F (2013) | 2.76 in (2011) |
| September 9 | 79.0°F (2012) | 51.1°F (2013) | 1.27 in (2004) |
| September 10 | 78.1°F (2011) | 51.1°F (2013) | 0.95 in (1993) |
| September 11 | 82.0°F (2013) | 48.0°F (2012) | 1.42 in (1985) |
| September 12 | 87.1°F (2013) | 48.0°F (2012) | 2.66 in (1971) |
| September 13 | 81.0°F (2013) | 52.0°F (2012) | 1.95 in (1971) |
| September 14 | 82.9°F (2011) | 51.1°F (2014) | 2.44 in (1987) |
| September 15 | 84.0°F (2011) | 46.0°F (2013) | 2.37 in (1973) |
| September 16 | 70.0°F (2012) | 44.1°F (2011) | 1.30 in (2002) |
| September 17 | 68.0°F (2012) | 48.0°F (2011) | 7.10 in (1999) |
| September 18 | 71.1°F (2012) | 44.1°F (2013) | 1.92 in (1969) |
| September 19 | 72.0°F (2014) | 45.0°F (2013) | 3.35 in (1972) |
| September 20 | 71.1°F (2013) | 46.0°F (2013) | 3.50 in (1989) |
| September 21 | 79.0°F (2013) | 48.0°F (2012) | 2.46 in (1989) |
| September 22 | 79.0°F (2013) | 53.1°F (2012) | 3.25 in (1979) |
| September 23 | 80.1°F (2012) | 45.0°F (2013) | 1.48 in (1975) |
| September 24 | 71.1°F (2011) | 43.0°F (2013) | 2.03 in (2011) |
| September 25 | 73.9°F (2011) | 42.1°F (2012) | 1.83 in (1975) |
| September 26 | 73.0°F (2012) | 46.0°F (2013) | 2.10 in (1993) |
| September 27 | 75.9°F (2014) | 50.0°F (2013) | 2.30 in (1985) |
| September 28 | 82.9°F (2014) | 50.0°F (2013) | 3.50 in (2003) |
| September 29 | 84.9°F (2014) | 48.9°F (2013) | 3.74 in (2004) |
| September 30 | 82.9°F (2014) | 46.9°F (2013) | 1.12 in (1999) |