Days of Sunshine Per Year in Pennsylvania

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Number of Sunny Days

In the table below, the average number of Sunny Days for a city in Pennsylvania is the total days in a year when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours. Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.

Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are annual averages, made from years of weather watching.

Annual days of sunshine
City Sunny Partly Sunny Total Days
With Sun
Allentown 94 110 204
Erie 63   97 160
Harrisburg 87 109 196
Philadelphia 93 112 205
Pittsburgh 59 103 162
Wilkes-Barre & Scranton 70 106 176
Williamsport 67 110 177

Amount of Sun

Here's another way to look at how much sunshine a city gets. The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are yearly averages based on many years of weather observations.

Percent sunshine yearly
City % Sun
Allentown 53
Harrisburg 58
Philadelphia 56
Pittsburgh 45
Wilkes-Barre & Scranton 51
Reference

National Climatic Data Center. Comparative Climatic Data.

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