Philadelphia weather in April
In April, Philadelphia has an average high of 17 °C63 °F and an average low of 5 °C41 °F, with about 97 mm3.8 in of precipitation. It is the 7th warmest month of the year and ranks 8th for precipitation.
How April compares with other months
Compared with March, April is 6.3 °C11.4 °F warmer on average. Compared with May, April is 5.7 °C10.2 °F cooler on average. Daylight lasts about 13.2 hours around the middle of the month. Average relative humidity is 78% and the average cloud amount 58%.
Is April a good time to visit Philadelphia?
April is not among the most comfortable months by our comfort score: it is cool (average high 17 °C63 °F), nights are cold (average low 5 °C41 °F) and it is fairly wet (97 mm3.8 in). The most comfortable months in Philadelphia are May and September.
What to wear in April
For Philadelphia in April, pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
April in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Philadelphia | 1763 | 541 | 973.8 |
| Allentown | 1661 | 439 | 973.8 |
| Atlantic City | 1457 | 744 | 933.7 |
| Staten Island | 1660 | 540 | 993.9 |
| Brooklyn | 1254 | 643 | 1074.2 |
| New York City | 1254 | 643 | 1074.2 |
| Paterson | 1661 | 439 | 1003.9 |
| Manhattan | 1558 | 439 | 1024.0 |
| Baltimore | 1864 | 643 | 943.7 |
Nearby places that are more than 1 °C1.8 °F warmer in April: Baltimore; cooler: Brooklyn, New York City, Paterson and Manhattan.
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 April?
In April the average high in Philadelphia is 17 °C (63 °F) and the average low is 5 °C (41 °F).
Does it rain a lot in Philadelphia in April?
On average about 97 mm (3.8 in) of precipitation falls in April; it ranks 8th of the 12 months.
Is April the warmest month in Philadelphia?
No. The warmest month in Philadelphia is July, with an average high of 30 °C (86 °F). The coldest month is January, with an average low of -5 °C (23 °F).
How long is the day in Philadelphia in April?
In the middle of April the day in Philadelphia lasts about 13.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Philadelphia in April?
The average relative humidity in April is about 78%. This is a long-term average for the whole day.
How cloudy is Philadelphia in April?
On average about 58% of the sky is covered by cloud in April. 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.