September weather in Sunbury, PA
The average temperature in Sunbury in September is 63.1°F (51.2°F–75.1°F). Average precipitation: 4.52 inches.
September is a fall month in Sunbury, and is warmer than the annual average of 50.3°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 15m. For travel, September is a comfortable month to visit.
Avg High
75.1°F
Avg Low
51.2°F
Precipitation
4.52 in
Daylight
12h 15m
September records in Sunbury
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (1961) | 41.0°F (2009) | 1.46 in (1940) |
| September 2 | 91.9°F (1960) | 39.9°F (1964) | 4.55 in (2021) |
| September 3 | 93.0°F (1966) | 41.0°F (1958) | 1.50 in (1952) |
| September 4 | 91.9°F (1973) | 41.0°F (1967) | 2.05 in (1933) |
| September 5 | 96.1°F (1964) | 43.0°F (1974) | 2.16 in (2011) |
| September 6 | 91.9°F (2018) | 41.0°F (1972) | 1.61 in (1968) |
| September 7 | 93.0°F (2018) | 37.0°F (1962) | 3.45 in (1999) |
| September 8 | 91.9°F (2015) | 37.9°F (1962) | 5.52 in (2011) |
| September 9 | 95.0°F (2015) | 39.9°F (1958) | 1.20 in (1942) |
| September 10 | 96.1°F (1964) | 41.0°F (2017) | 3.25 in (1968) |
| September 11 | 95.0°F (1964) | 37.9°F (1967) | 1.93 in (1950) |
| September 12 | 95.0°F (2013) | 37.0°F (1967) | 1.89 in (2013) |
| September 13 | 91.9°F (1961) | 37.9°F (1958) | 1.30 in (1944) |
| September 14 | 91.0°F (1961) | 30.0°F (1964) | 2.05 in (1929) |
| September 15 | 89.1°F (2016) | 30.0°F (1964) | 2.56 in (1973) |
| September 16 | 88.0°F (1958) | 35.1°F (1963) | 1.49 in (2021) |
| September 17 | 89.1°F (1970) | 35.1°F (1959) | 4.77 in (1934) |
| September 18 | 89.1°F (1964) | 33.1°F (1959) | 6.00 in (2004) |
| September 19 | 90.0°F (1964) | 33.1°F (1959) | 2.19 in (2012) |
| September 20 | 89.1°F (1965) | 33.1°F (2020) | 0.48 in (1952) |
| September 21 | 84.9°F (2016) | 32.0°F (1962) | 1.32 in (1938) |
| September 22 | 90.0°F (1965) | 33.1°F (2020) | 2.10 in (2024) |
| September 23 | 91.0°F (1965) | 33.1°F (2020) | 2.09 in (2002) |
| September 24 | 90.0°F (1959) | 27.0°F (1963) | 1.35 in (2021) |
| September 25 | 91.9°F (1961) | 28.0°F (1963) | 2.88 in (2001) |
| September 26 | 91.0°F (2017) | 30.0°F (1963) | 5.22 in (1975) |
| September 27 | 91.0°F (2007) | 28.9°F (1957) | 1.87 in (2008) |
| September 28 | 89.1°F (2017) | 28.0°F (1957) | 1.70 in (2011) |
| September 29 | 86.0°F (2025) | 30.9°F (1957) | 2.66 in (2011) |
| September 30 | 80.1°F (1959) | 34.0°F (1961) | 1.63 in (2015) |