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.
|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|
|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.
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 2019.
|Hottest month:||July||30°C 86°F|
|Driest month:||February||74mm 2.9ins|
|Coldest month:||January||3.5°C 38.3°F|
|Wettest month:||July||115mm 4.5ins|