Summer temperatures · Pennsylvania
How hot does Philadelphia get in summer?
Philadelphia right now
43°FBroken cloud
- Today44°F / 42°FClouds
- Tomorrow48°F / 37°FClouds
- Monday48°F / 36°FClouds
Waiting for sun? Don't hold your breath.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Philadelphia averages highs around 86°F and lows around 67°F.
About 30 days a year reach 90°F or hotter, and about one reaches 100°F. About 107 days a year get to 80°F or warmer. That makes it the 49th hottest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 48°F.
Philadelphia averages about 30 days a year at 90°F or hotter, and on every one of them the subway platforms take it personally.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 86°F |
|---|---|
| Average summer low | 67°F |
| Days a year at 80°F or warmer | 107 |
| Days a year at 90°F or hotter | 30 |
| Days a year at 100°F or hotter | 1 |
| Average winter high, for comparison | 44°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Kansas City, Missouri: highs around 87°F, lows around 66°F
- Grand Junction, Colorado: highs around 92°F, lows around 61°F
- Baltimore, Maryland: highs around 87°F, lows around 65°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00013739.