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Get the Philadelphia PA weather forecast without ads, cookies, or tracking. Open-Meteo data, 10-day forecast, hourly conditions, and radar — all free. click here to hide this
July is the hottest month in Philadelphia PA, with an average high of 88°F / 31°C; January is the coldest (41°F / 5°C). September is the wettest month, averaging 4.4 in / 112 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 41 / 5 | 27 / -3 | 3.1 / 80 | 8 |
| Feb | 44 / 7 | 28 / -2 | 2.8 / 70 | 8 |
| Mar | 53 / 12 | 35 / 2 | 4.0 / 101 | 9 |
| Apr | 65 / 18 | 45 / 7 | 3.5 / 88 | 8 |
| May | 74 / 24 | 55 / 13 | 3.3 / 85 | 9 |
| Jun | 83 / 28 | 65 / 18 | 4.1 / 103 | 9 |
| Jul | 88 / 31 | 70 / 21 | 4.4 / 111 | 8 |
| Aug | 86 / 30 | 69 / 20 | 4.3 / 109 | 7 |
| Sep | 79 / 26 | 62 / 17 | 4.4 / 112 | 8 |
| Oct | 67 / 20 | 50 / 10 | 3.5 / 88 | 7 |
| Nov | 56 / 13 | 40 / 4 | 2.9 / 74 | 7 |
| Dec | 46 / 8 | 32 / 0 | 4.0 / 101 | 9 |
Extremes since 1940: highest 104°F / 40°C (July 3, 1966), lowest -7°F / -22°C (January 17, 1982).
Daylight lasts about 14.8 hours in June and 9.2 hours in December.
Data: Meteostat — Philadelphia International Airport, 1991–2020 averages.
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