Viewing Station: IL-DP-78 : Naperville 2.4 SE
Sep 1, 2009 - Oct 31, 20253,994 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.77"
October 1-31, 2025(31 of 31 days covered by obs)
NOAA Normal
3.48"
Departure from Normal
-1.71" : 51% of Normal
Year-To-Date: 29.91"
Jan 1 to Oct 31, 2025(304 of 304 days covered by obs)
NOAA Normal
33.78"
Departure from Normal
-3.87" : 89% of Normal
Water Year-To-Date: 1.77"
Oct 1, 2025 to Oct 31, 2025(31 of 31 days covered by obs)
NOAA Normal
3.48"
Departure from Normal
-1.71" : 51% 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