Philadelphia Climate by Month
Philadelphia, Pennsylvania, United States
Hot summers and cold winters, with rain spread through the year.
Philadelphia has hot summers and cold winters, with rain spread through the year. Afternoon highs range from 42°F (6°C) in January to 89°F (31°C) in July, and January nights average 26°F (-3°C). It gets 44 in (1111 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(31°C)
- Average high, July
- Coldest nights
- 26°F(-3°C)
- Average low, January
- Rain per year
- 44 in(1111 mm)
- No clear rainy season
- Humidity
- 62%
- Sunniest: July
Best and worst months in Philadelphia
Best for weatherThe most comfortable weather comes in May, with highs around 76°F (24°C) and about 3.5 in (89 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 42°F (6°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Philadelphia weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 42°F(6°C) | 26°F(-3°C) | 3.3 in(83 mm) | 60% | 1.7 |
| FebFebruary | 45°F(7°C) | 27°F(-3°C) | 2.8 in(70 mm) | 55% | 2.7 |
| MarMarch | 53°F(12°C) | 34°F(1°C) | 4.1 in(103 mm) | 62% | 3.5 |
| AprApril | 65°F(19°C) | 43°F(6°C) | 3.4 in(87 mm) | 55% | 4.6 |
| MayMayBest | 76°F(24°C) | 54°F(12°C) | 3.5 in(89 mm) | 62% | 5.3 |
| JunJune | 84°F(29°C) | 63°F(17°C) | 4.0 in(101 mm) | 63% | 5.6 |
| JulJuly | 89°F(31°C) | 68°F(20°C) | 4.3 in(109 mm) | 63% | 5.6 |
| AugAugust | 87°F(30°C) | 67°F(19°C) | 4.2 in(106 mm) | 67% | 5.0 |
| SepSeptember | 80°F(27°C) | 60°F(15°C) | 4.0 in(102 mm) | 64% | 4.1 |
| OctOctober | 69°F(21°C) | 48°F(9°C) | 3.3 in(85 mm) | 66% | 3.0 |
| NovNovember | 57°F(14°C) | 38°F(3°C) | 3.0 in(76 mm) | 63% | 2.0 |
| DecDecember | 47°F(8°C) | 31°F(-1°C) | 3.9 in(100 mm) | 63% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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