United States of America
Philadelphia sees feels-like daytime highs peak around 36.5°C in July and nighttime lows bottom out near -3.3°C in January. July is the wettest month (~96 mm), while February is the driest (~55 mm). For sunshine, September leads with about 63% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are May, September, and October — expect around 15.9–26.3°C with roughly 33% chance of rain on a given day in May.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | -3.3° / 3.4° | 15% | 60 mm | 47% | 13.7 kph |
| February | -2.2° / 4.9° | 15% | 55 mm | 48% | 14.4 kph |
| March | 2.5° / 11.4° | 23% | 81 mm | 49% | 14.5 kph |
| April | 8.6° / 19° | 29% | 90 mm | 51% | 13.5 kph |
| May☀ | 15.9° / 26.3° | 33% | 89 mm | 51% | 11.5 kph |
| June | 22.6° / 33.4° | 35% | 89 mm | 53% | 10 kph |
| July | 26.2° / 36.5° | 37% | 96 mm | 59% | 9.3 kph |
| August | 24.9° / 35° | 33% | 95 mm | 62% | 9.2 kph |
| September☀ | 19.5° / 28.9° | 28% | 90 mm | 63% | 10.1 kph |
| October☀ | 12° / 20.9° | 25% | 88 mm | 62% | 11.4 kph |
| November | 4.9° / 12.9° | 24% | 83 mm | 55% | 12.3 kph |
| December | -0.3° / 6.1° | 21% | 80 mm | 48% | 12.9 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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