United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Philadelphia are May, September and October, when daytime temperatures are agreeable and rainfall is relatively low.
Philadelphia sees its warmest weather in July, when daytime highs average around 31°C, and its coolest in January (around 5°C).
Annual precipitation totals roughly 1121mm — September is typically the wettest month (~112mm) and February the driest (~70mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 5° / -3°C | 80mm | 🤔 Fair |
| February | 7° / -2°C | 70mm | 🤔 Fair |
| March | 12° / 1°C | 101mm | 🤔 Fair |
| April | 18° / 7°C | 88mm | 👍 Good |
| May | 24° / 12°C | 85mm | 🌟 Great |
| June | 28° / 18°C | 103mm | 👍 Good |
| July | 31° / 21°C | 111mm | 🤔 Fair |
| August | 30° / 20°C | 109mm | 👍 Good |
| September | 26° / 16°C | 112mm | 👍 Good |
| October | 20° / 10°C | 88mm | 👍 Good |
| November | 13° / 4°C | 74mm | 🤔 Fair |
| December | 8° / 0°C | 101mm | ⚠️ Challenging |
January in Philadelphia is cold, with average daytime highs around 5°C (41°F) and nighttime lows near -3°C (26°F). Expect roughly 80mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — warm coat · sweaters and layers · scarf
February in Philadelphia is cold, with average daytime highs around 7°C (44°F) and nighttime lows near -2°C (28°F). Expect roughly 70mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — warm coat · sweaters and layers · scarf
March in Philadelphia is chilly, with average daytime highs around 12°C (53°F) and nighttime lows near 1°C (34°F). Expect roughly 101mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
April in Philadelphia is mild, with average daytime highs around 18°C (65°F) and nighttime lows near 7°C (44°F). Expect roughly 88mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
May in Philadelphia is pleasantly warm, with average daytime highs around 24°C (74°F) and nighttime lows near 12°C (54°F). Expect roughly 85mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
June in Philadelphia is warm, with average daytime highs around 28°C (83°F) and nighttime lows near 18°C (64°F). Expect roughly 103mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
July in Philadelphia is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 21°C (70°F). Expect roughly 111mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
August in Philadelphia is warm, with average daytime highs around 30°C (86°F) and nighttime lows near 20°C (68°F). Expect roughly 109mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
September in Philadelphia is warm, with average daytime highs around 26°C (79°F) and nighttime lows near 16°C (61°F). Expect roughly 112mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
October in Philadelphia is pleasantly warm, with average daytime highs around 20°C (67°F) and nighttime lows near 10°C (49°F). Expect roughly 88mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
November in Philadelphia is chilly, with average daytime highs around 13°C (56°F) and nighttime lows near 4°C (39°F). Expect roughly 74mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
December in Philadelphia is cold, with average daytime highs around 8°C (46°F) and nighttime lows near 0°C (31°F). Expect roughly 101mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — warm coat · sweaters and layers · scarf