Average Temperatures for Pennsylvania in September
Average temperatures for September at cities, communities and other locations throughout Pennsylvania are listed below in degrees Fahrenheit and Celsius.
You can jump to a separate table for Eastern and Western Pennsylvania.
The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.
Eastern Pennsylvania
| High °F | Low °F | Place | High °C | Low °C |
|---|---|---|---|---|
| 77 | 55 | Allentown | 25 | 13 |
| 76 | 56 | Chambersburg | 24 | 13 |
| 75 | 52 | East Stroudsburg | 24 | 11 |
| 73 | 50 | George Stevenson Reservoir | 23 | 10 |
| 78 | 54 | Gettysburg | 25 | 12 |
| 79 | 58 | Harrisburg | 26 | 15 |
| 78 | 56 | Lancaster | 26 | 13 |
| 76 | 55 | Lebanon | 24 | 13 |
| 74 | 51 | Matamoras | 23 | 10 |
| 80 | 58 | Norristown | 27 | 14 |
| 79 | 61 | Philadelphia | 26 | 16 |
| 77 | 57 | Reading | 25 | 14 |
| 72 | 54 | State College | 22 | 12 |
| 75 | 51 | Sunbury | 24 | 11 |
| 75 | 51 | Towanda | 24 | 10 |
| 75 | 54 | Wilkes-Barre & Scranton | 24 | 12 |
| 75 | 54 | Williamsport | 24 | 12 |
| 80 | 55 | York | 27 | 13 |
Western Pennsylvania
| High °F | Low °F | Place | High °C | Low °C |
|---|---|---|---|---|
| 74 | 53 | Altoona | 23 | 12 |
| 71 | 47 | Bradford | 22 | 8 |
| 74 | 50 | Butler | 24 | 10 |
| 71 | 51 | DuBois | 22 | 11 |
| 74 | 57 | Erie | 23 | 14 |
| 75 | 51 | Indiana | 24 | 11 |
| 74 | 51 | Jamestown | 23 | 10 |
| 72 | 53 | Meadville | 22 | 12 |
| 79 | 52 | New Castle | 26 | 11 |
| 75 | 55 | Pittsburgh | 24 | 13 |
| 78 | 53 | Uniontown | 25 | 12 |
| 74 | 52 | Warren | 23 | 11 |
| 76 | 52 | Youghiogheny River Lake | 25 | 11 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.