The warmest month in Philadelphia is July, with an average high of 31°C and an average low of 21.4°C. The coldest month is January, with an average high of 5.3°C and an average low of -2.8°C. Between 2016 and 2025, the highest temperature recorded was 39.3°C (June 24, 2025) and the lowest was -21.9°C (January 7, 2018).
| Month | Avg. high | Avg. low | Precipitation |
|---|---|---|---|
| January | 5.3°C | -2.8°C | 85 mm |
| February | 8.1°C | -1.2°C | 89 mm |
| March | 12.2°C | 1.7°C | 111 mm |
| April | 17.6°C | 6.9°C | 109 mm |
| May | 22.4°C | 12.3°C | 122 mm |
| June | 28°C | 17.6°C | 98 mm |
| July | 31°C | 21.4°C | 124 mm |
| August | 29.4°C | 20.2°C | 112 mm |
| September | 26.1°C | 16.9°C | 103 mm |
| October | 20.1°C | 10.9°C | 98 mm |
| November | 12.9°C | 3.8°C | 79 mm |
| December | 7.2°C | -0.5°C | 103 mm |
Based on daily historical weather data 2016–2025. Weather data by Open-Meteo.com.
Explore detailed temperature patterns in Philadelphia, United States through interactive candlestick charts. View historical weather data with daily temperature ranges, trends, and variations. Whether you're planning a trip to Philadelphia or analyzing local climate patterns, our unique visualization makes temperature data easy to understand. Get insights into Philadelphia's weather patterns from hourly updates to yearly historical data.