Weather in Philadelphia in May
May in Philadelphia is mild with average temperatures around 16.4°C (61.5°F). Moderate rainfall of 96mm spread over 12 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
22.0°C
71.6°F
Low
10.7°C
51.3°F
Precipitation
96 mm
3.8 inches
~12 rainy days
Conditions
Humidity
79%
Comparison to Adjacent Months
May is 5.6°C warmer than April.
May is 5.0°C cooler than June, 25mm drier than June.