Philadelphia Weather in May

What's the weather like in Philadelphia, United States in May 2018?

The climate in Philadelphia during May can be summarized as mild and damp.

May is in the spring in Philadelphia and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (74°F), whilst at night 11°C (51°F) is normal.

Philadelphia weather averages (imperial / metric)
Daytime temperature 23.3°C 73.9°F
Nightly temperature 10.8°C 51.4°F
Average temperature 17°C 62.6°F
Daily sunshine 8.5 hrs
Avg rainfall 101 mm 4 ins
Rainy days 11 days
Sea temperature 10°C 49.9°F
Humidity 66%
Windspeed 16.6kph 10 mph

On average May is the 3rd wettest month of the year in Philadelphia with around 101mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.5 hours of sunshine per day.

May temperatures in Philadelphia

May rainfall

May hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in May 2018.

Other monthly averages

Philadelphia weather stats

Philadelphia weather statistics
Hottest month: July 30°C 86°F
Driest month: February 74mm 2.9ins
Sunniest month: August 9hrs
Coldest month: January 3.5°C 38.3°F
Wettest month: July 115mm 4.5ins
Map showing location of Philadelphia (39.95234, -75.16379)

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