Philadelphia weather in April
Temperature, sea and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Good
Best time to visit: April – June, August – October
What is the weather like in Philadelphia in April?
In April, Philadelphia is mild: daytime highs average 17 °C, and nights cool down to about 7 °C. The sea averages 9.6 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 93 mm in total. All in all, April is a good month for a holiday in Philadelphia.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 13 min06:24 – 19:38
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 59 %on averageAll months
- Hot days
- 0 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 %94 %
- Sunshineweight 20 %58 %
- Few rainy daysweight 30 %52 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in April
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Philadelphia in April: quick answers
Is Philadelphia hot in April?
No. In April, Philadelphia is mild: daytime highs average 17 °C and nights drop to about 7 °C.
Can you swim in Philadelphia in April?
Only if you don't mind cold water: in April the sea averages just 9.6 °C. Comfortable swimming is possible from June to September.
Does it rain much in Philadelphia in April?
Rain is frequent, with about 11 rainy days and 93 mm in total.
Philadelphia month by month
The whole year in PhiladelphiaAll destinations: USAWhere to go in AprilSea temperature in April
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