September weather in Reading, PA
The average temperature in Reading in September is 66.9°F (56.6°F–77.1°F). Average precipitation: 4.88 inches.
September is a fall month in Reading, and is warmer than the annual average of 53.7°F. Daily temperatures swing about 20.5°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
77.1°F
Avg Low
56.6°F
Precipitation
4.88 in
Daylight
12h 15m
September records in Reading
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (2010) | 48.9°F (2009) | 4.95 in (2021) |
| September 2 | 99.0°F (2010) | 42.1°F (1949) | 2.24 in (2006) |
| September 3 | 93.0°F (2015) | 46.9°F (1949) | 0.43 in (2020) |
| September 4 | 95.0°F (2023) | 50.0°F (2024) | 2.06 in (2025) |
| September 5 | 93.0°F (2018) | 50.0°F (2000) | 2.00 in (2011) |
| September 6 | 95.0°F (2023) | 46.9°F (2000) | 2.52 in (2008) |
| September 7 | 98.1°F (2023) | 45.0°F (2000) | 2.28 in (2011) |
| September 8 | 95.0°F (2015) | 50.0°F (2000) | 1.35 in (2011) |
| September 9 | 93.9°F (2015) | 45.0°F (1949) | 1.67 in (2018) |
| September 10 | 95.0°F (2016) | 42.1°F (1949) | 1.40 in (2015) |
| September 11 | 93.9°F (2013) | 44.1°F (1949) | 1.24 in (2009) |
| September 12 | 90.0°F (2005) | 51.1°F (2006) | 2.54 in (2015) |
| September 13 | 93.0°F (2005) | 48.9°F (2002) | 0.68 in (2017) |
| September 14 | 91.9°F (2008) | 46.0°F (2014) | 1.13 in (2006) |
| September 15 | 89.1°F (2021) | 43.0°F (2013) | 2.10 in (2003) |
| September 16 | 89.1°F (2005) | 43.0°F (2001) | 4.78 in (1999) |
| September 17 | 84.9°F (2005) | 42.1°F (2007) | 0.61 in (2004) |
| September 18 | 87.1°F (2021) | 42.1°F (2013) | 3.36 in (2004) |
| September 19 | 88.0°F (2025) | 44.1°F (2020) | 2.32 in (2016) |
| September 20 | 87.1°F (2017) | 39.9°F (2020) | 1.38 in (2001) |
| September 21 | 87.1°F (2017) | 37.9°F (2020) | 0.54 in (2013) |
| September 22 | 91.9°F (2010) | 37.9°F (2020) | 0.38 in (2003) |
| September 23 | 91.9°F (2019) | 43.0°F (1999) | 3.15 in (2003) |
| September 24 | 91.9°F (2010) | 41.0°F (2013) | 1.02 in (2001) |
| September 25 | 90.0°F (2017) | 37.9°F (1949) | 1.08 in (2018) |
| September 26 | 90.0°F (2007) | 39.9°F (1949) | 1.74 in (2002) |
| September 27 | 89.1°F (2017) | 39.0°F (2000) | 0.48 in (2002) |
| September 28 | 87.1°F (2025) | 41.0°F (2000) | 3.20 in (2006) |
| September 29 | 82.0°F (2019) | 34.0°F (2000) | 2.05 in (2020) |
| September 30 | 81.0°F (2025) | 35.1°F (2000) | 5.15 in (2010) |