Pennsylvania climate

World Climates covers 4 places in Pennsylvania. By annual mean temperature, the warmest is Philadelphia (12 °C54 °F) and the coolest is Wilkes-Barre (11 °C51 °F). The wettest is Allentown with 1,233 mm49 in of precipitation per year, the driest Pittsburgh with 990 mm39 in.

The most common climate types (Köppen classification computed from these averages) are hot-summer humid continental (Dfa, 4 places).

The highest monthly average high is in Allentown (30 °C86 °F in July); the lowest monthly average low is in Wilkes-Barre (−7 °C20 °F in January).

Across the places in Pennsylvania, the months that most often rank as the most comfortable are May, August and September (4, 1 and 4 of 4 places respectively).

Frequently asked questions

Which is the warmest place in Pennsylvania?

By annual mean temperature, the warmest place in Pennsylvania is Philadelphia at 12 °C54 °F. The coolest is Wilkes-Barre at 11 °C51 °F.

Where does it rain the most in Pennsylvania?

Allentown gets the most precipitation, 1,233 mm49 in in an average year. The driest place is Pittsburgh with 990 mm39 in.

How many places in Pennsylvania does this site cover?

World Climates has climate data for 4 places in Pennsylvania. Each one has a page with monthly averages for temperature, rainfall, humidity and daylight.

When is the best time to visit Pennsylvania?

It depends on the place. Across Pennsylvania, the months that most often rank as the most comfortable are May, August and September. Check the page of each city for its own best months.