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The weather in Pennsylvania in August is hot. The average temperatures are between 21°C and 29°C.
You can expect about 3 to 8 days of rain in Pennsylvania during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Pennsylvania in August 2025.
If you’re planning to visit Pennsylvania in the near future, we highly recommend that you review the 14 day weather forecast for Pennsylvania before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -3° | 5 | 19 | 6 | 49 mm | Awful | Pennsylvania in January |
| February | 5° / -2° | 6 | 16 | 6 | 70 mm | Awful | Pennsylvania in February |
| March | 10° / 2° | 6 | 21 | 4 | 70 mm | Bad | Pennsylvania in March |
| April | 17° / 8° | 5 | 25 | 0 | 63 mm | Good | Pennsylvania in April |
| May | 22° / 13° | 6 | 26 | 0 | 77 mm | Good | Pennsylvania in May |
| June | 27° / 18° | 5 | 25 | 0 | 88 mm | Perfect | Pennsylvania in June |
| July | 30° / 21° | 6 | 25 | 0 | 98 mm | Good | Pennsylvania in July |
| August | 29° / 21° | 5 | 26 | 0 | 106 mm | Good | Pennsylvania in August |
| September | 26° / 17° | 3 | 27 | 0 | 69 mm | Perfect | Pennsylvania in September |
| October | 19° / 12° | 4 | 27 | 0 | 72 mm | Good | Pennsylvania in October |
| November | 12° / 5° | 4 | 25 | 1 | 51 mm | Ok | Pennsylvania in November |
| December | 7° / 1° | 5 | 22 | 3 | 73 mm | Bad | Pennsylvania in December |