Philadelphia weather in July
In July, Philadelphia has an average high of 30 °C86 °F and an average low of 20 °C67 °F, with about 124 mm4.9 in of precipitation. July is the warmest month of the year and the wettest.
How July compares with other months
Compared with June, July is 3 °C5.4 °F warmer on average. Compared with August, July is 0.6 °C1.1 °F warmer on average. Daylight lasts about 14.7 hours around the middle of the month. Average relative humidity is 75% and the average cloud amount 53%.
Is July a good time to visit Philadelphia?
July is not among the most comfortable months by our comfort score: it is hot (average high 30 °C86 °F) and it is fairly wet (124 mm4.9 in). The most comfortable months in Philadelphia are May and September.
What to wear in July
For Philadelphia in July, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
July in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Philadelphia | 3086 | 2067 | 1244.9 |
| Allentown | 3086 | 1966 | 1265.0 |
| Atlantic City | 2780 | 2171 | 1114.4 |
| Staten Island | 3085 | 2067 | 1174.6 |
| Brooklyn | 2679 | 2170 | 1144.5 |
| New York City | 2679 | 2170 | 1144.5 |
| Paterson | 3086 | 1966 | 1174.6 |
| Manhattan | 2985 | 1967 | 1094.3 |
| Baltimore | 3188 | 2169 | 1144.5 |
Nearby places that are more than 1 °C1.8 °F warmer in July: Baltimore; cooler: Brooklyn and New York City.
Other months in Philadelphia
- January3 °C38 °F / −5 °C23 °F
- February5 °C41 °F / −4 °C24 °F
- March10 °C50 °F / −1 °C31 °F
- April17 °C63 °F / 5 °C41 °F
- May22 °C72 °F / 11 °C52 °F
- June27 °C81 °F / 17 °C62 °F
- July30 °C86 °F / 20 °C67 °F
- August30 °C85 °F / 19 °C66 °F
- September26 °C79 °F / 15 °C59 °F
- October19 °C67 °F / 8 °C47 °F
- November12 °C54 °F / 2 °C36 °F
- December7 °C44 °F / −2 °C28 °F
Frequently asked questions
How warm is Philadelphia in July?
In July the average high in Philadelphia is 30 °C (86 °F) and the average low is 20 °C (67 °F).
Does it rain a lot in Philadelphia in July?
On average about 124 mm (4.9 in) of precipitation falls in July; it ranks 1st of the 12 months.
Is July the warmest month in Philadelphia?
Yes. July is the warmest month in Philadelphia. The coldest month is January, with an average low of -5 °C (23 °F).
How long is the day in Philadelphia in July?
In the middle of July the day in Philadelphia lasts about 14.7 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Philadelphia in July?
The average relative humidity in July is about 75%. Combined with warm days, it can feel muggy.
How cloudy is Philadelphia in July?
On average about 53% of the sky is covered by cloud in July. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.