Viewing Station: PA-CH-9 : West Chester 2.4 SSE
Jan 14, 2009 - Sep 20, 20265,992 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.14"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
3.26"
Departure from Normal
-0.12" : 96% of Normal
Year-To-Date: 34.22"
Jan 1 to Sep 20, 2026(263 of 263 days covered by obs)
NOAA Normal
34.39"
Departure from Normal
-0.17" : 100% of Normal
Water Year-To-Date: 41.70"
Oct 1, 2025 to Sep 20, 2026(355 of 355 days covered by obs)
NOAA Normal
46.09"
Departure from Normal
-4.39" : 90% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.44
3.57
-0.13
Feb
2.79
2.88
-0.09
Mar
4.22
4.33
-0.11
Apr
3.68
3.69
-0.01
May
3.75
3.87
-0.12
Jun
4.28
4.38
-0.10
Jul
4.60
4.62
-0.02
Aug
4.37
4.60
-0.23
Sep
4.89
4.99
-0.10
Oct
4.19
4.36
-0.17
Nov
3.32
3.30
0.02
Dec
4.19
4.39
-0.20
47.72
48.98
-1.26