Average Rainfall for Pennsylvania in September





The tables below give monthly averages for rainfall during September at cities and other locations in Pennsylvania.

Each place has a total for the amount of precipitation it usually receives this month along with information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The rainfall totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for Eastern and Western Pennsylvania.

Eastern Pennsylvania

Average monthly precipitation in September
Days Place Inches Milli­metres
10 Allentown 4.8 123
9 Chambersburg 4.1 105
10 East Stroudsburg 5.3 135
11 George Stevenson Reservoir 4.3 109
9 Gettysburg 4.6 118
10 Harrisburg 4.1 105
10 Lancaster 4.8 122
10 Lebanon 4.6 118
10 Matamoras 4.7 118
9 Norristown 4.9 125
9 Philadelphia 4.4 112
9 Reading 4.9 124
11 State College 4.0 100
9 Sunbury 4.5 115
10 Towanda 3.8 97
10 Wilkes-Barre & Scranton 4.2 105
10 Williamsport 4.8 121
10 York 5.1 130

Western Pennsylvania

September averages for total rainfall
Days Place Inches Milli­metres
10 Altoona 4.0 101
11 Bradford 4.2 106
11 Butler 4.1 104
13 DuBois 4.0 101
10 Erie 4.3 110
12 Indiana 4.2 106
11 Jamestown 4.2 108
12 Meadville 4.2 106
11 New Castle 3.9 98
10 Pittsburgh 3.3 84
11 Uniontown 3.6 90
12 Warren 4.0 100
12 Youghiogheny River Lake 4.0 101
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Pennsylvania Precipitation
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