Philadelphia weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Good
Best time to visit: April – June, August – October
What is the weather like in Philadelphia in July?
In July, Philadelphia is hot: daytime highs average 30 °C, and even at night it stays warm at around 21 °C. The sea averages 23.7 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 11 rainy days and 97 mm in total. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a good month for a holiday in Philadelphia.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 45 min05:44 – 20:29
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 18 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 55 %on averageAll months
- Hot days
- 15 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 50 %64 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %51 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Philadelphia in July: quick answers
Is Philadelphia hot in July?
Yes. In July, Philadelphia is hot: daytime highs average 30 °C and nights stay around 21 °C. On about 15 days the thermometer climbs to 30 °C or more.
Can you swim in Philadelphia in July?
Yes. In July the sea averages 23.7 °C – pleasant for swimming.
Does it rain much in Philadelphia in July?
Rain is frequent, with about 11 rainy days and 97 mm in total.
Philadelphia month by month
The whole year in PhiladelphiaAll destinations: USAWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences