September weather in Lock Haven, PA
The average temperature in Lock Haven in September is 64.2°F (52.6°F–75.8°F). Average precipitation: 4.25 inches.
September is a fall month in Lock Haven, and is warmer than the annual average of 50.3°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
75.8°F
Avg Low
52.6°F
Precipitation
4.25 in
Daylight
12h 16m
September records in Lock Haven
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (1973) | 44.1°F (1987) | 0.70 in (1993) |
| September 2 | 96.1°F (1973) | 43.0°F (1987) | 1.30 in (2021) |
| September 3 | 100.0°F (1973) | 43.0°F (1987) | 1.86 in (2006) |
| September 4 | 96.1°F (1973) | 42.1°F (1997) | 1.08 in (1993) |
| September 5 | 93.0°F (2023) | 42.1°F (1997) | 1.81 in (2011) |
| September 6 | 93.9°F (2018) | 39.9°F (2000) | 1.60 in (1979) |
| September 7 | 93.9°F (1998) | 39.0°F (1984) | 2.48 in (2011) |
| September 8 | 95.0°F (2016) | 39.9°F (1986) | 0.94 in (2016) |
| September 9 | 96.1°F (2002) | 37.9°F (1986) | 2.20 in (2004) |
| September 10 | 97.0°F (2002) | 43.0°F (1981) | 1.77 in (2018) |
| September 11 | 97.0°F (1983) | 37.9°F (1995) | 2.35 in (2018) |
| September 12 | 93.9°F (1983) | 37.0°F (1985) | 1.16 in (2009) |
| September 13 | 91.9°F (1998) | 39.9°F (1985) | 1.37 in (1996) |
| September 14 | 91.9°F (1998) | 39.9°F (1985) | 0.58 in (1996) |
| September 15 | 91.9°F (1998) | 39.9°F (1985) | 1.87 in (1973) |
| September 16 | 93.9°F (1998) | 37.9°F (1984) | 1.09 in (2003) |
| September 17 | 91.9°F (1991) | 37.0°F (2013) | 1.61 in (1999) |
| September 18 | 87.1°F (1991) | 36.0°F (1990) | 6.10 in (2004) |
| September 19 | 88.0°F (2025) | 36.0°F (2020) | 1.54 in (2016) |
| September 20 | 91.9°F (1983) | 35.1°F (2020) | 0.93 in (1989) |
| September 21 | 90.0°F (1983) | 34.0°F (2020) | 0.88 in (2001) |
| September 22 | 86.0°F (1998) | 35.1°F (2020) | 1.21 in (1974) |
| September 23 | 90.0°F (1973) | 36.0°F (1983) | 3.10 in (2021) |
| September 24 | 88.0°F (2016) | 30.0°F (1983) | 1.13 in (1977) |
| September 25 | 89.1°F (2017) | 34.0°F (1992) | 2.65 in (2001) |
| September 26 | 89.1°F (2007) | 36.0°F (1981) | 3.74 in (1975) |
| September 27 | 90.0°F (2017) | 34.0°F (1980) | 1.02 in (1982) |
| September 28 | 90.0°F (2017) | 32.0°F (1988) | 1.85 in (2004) |
| September 29 | 86.0°F (2019) | 32.0°F (2000) | 2.23 in (1997) |
| September 30 | 89.1°F (1986) | 32.0°F (1991) | 1.30 in (2020) |