Viewing Station: IL-DP-78 : Naperville 2.4 SE
Sep 1, 2009 - Dec 15, 20254,035 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.77"
December 1-16, 2025(15 of 16 days covered by obs)
NOAA Normal
1.11"
Departure from Normal
-0.34" : 69% of Normal
Year-To-Date: 33.16"
Jan 1 to Dec 16, 2025(349 of 350 days covered by obs)
NOAA Normal
37.50"
Departure from Normal
-4.34" : 88% of Normal
Water Year-To-Date: 5.02"
Oct 1, 2025 to Dec 16, 2025(76 of 77 days covered by obs)
NOAA Normal
7.20"
Departure from Normal
-2.18" : 70% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.02
2.05
-0.03
Feb
1.81
1.90
-0.09
Mar
2.37
2.33
0.04
Apr
3.89
3.86
0.03
May
4.56
4.68
-0.12
Jun
4.45
4.41
0.04
Jul
3.88
3.93
-0.05
Aug
4.07
3.94
0.13
Sep
3.25
3.23
0.02
Oct
3.48
3.48
0.00
Nov
2.61
2.56
0.05
Dec
2.16
2.14
0.02
38.55
38.51
0.04