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Pennsylvania > 
| Month | Max. | Min. | Avg. |
|---|---|---|---|
| January | 7°C | -12°C | -1°C |
| February | 13°C | -7°C | 2°C |
| March | 18°C | -5°C | 4°C |
| April | 21°C | 0°C | 8°C |
| May | 23°C | 7°C | 14°C |
| June | 26°C | 11°C | 19°C |
| July | 29°C | 13°C | 21°C |
| August | 31°C | 14°C | 21°C |
| September | 29°C | 9°C | 19°C |
| October | 26°C | 4°C | 14°C |
| November | 16°C | -4°C | 6°C |
| December | 14°C | -4°C | 5°C |
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