Weather history and climate summary information is available for the following locations:
- Allentown
- Erie
- Harrisburg
- Philadelphia
- Pittsburgh
- Pittsburgh (pennsylva)
- Scranton
Warmest April Days
The warmest April days in Pennsylvania are:
| Philadelphia, Pennsylvania | 2002 | 95°F |
| Philadelphia, Pennsylvania | 1976 | 93.9°F |
| Philadelphia, Pennsylvania | 2009 | 93°F |
| Scranton, Pennsylvania | 2009 | 93°F |
| Allentown, Pennsylvania | 1976 | 93°F |
Coldest April Days
The coldest April days in Pennsylvania were:
| Erie, Pennsylvania | 1982 | 11.8°F |
| Pittsburgh (pennsylva), Pennsylvania | 1982 | 14°F |
| Pittsburgh, Pennsylvania | 1997 | 14°F |
| Scranton, Pennsylvania | 1982 | 14°F |
| Pittsburgh (pennsylva), Pennsylvania | 1950 | 14.4°F |
Wettest April Days
The wettest single days in April occurred:
| Philadelphia, Pennsylvania | 1973 | 13.8 inches |
| Scranton, Pennsylvania | 1973 | 11.8 inches |
| Pittsburgh (pennsylva), Pennsylvania | 1973 | 10.6 inches |
| Pittsburgh (pennsylva), Pennsylvania | 1983 | 4.1 inches |
| Harrisburg, Pennsylvania | 2011 | 3.9 inches |