Viewing Station: IL-DP-78 : Naperville 2.4 SE
Sep 1, 2009 - Jul 29, 20264,242 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 6.31"
July 1-30, 2026(29 of 30 days covered by obs)
NOAA Normal
3.75"
Departure from Normal
2.56" : 168% of Normal
Year-To-Date: 28.39"
Jan 1 to Jul 30, 2026(210 of 211 days covered by obs)
NOAA Normal
22.85"
Departure from Normal
5.54" : 124% of Normal
Water Year-To-Date: 35.05"
Oct 1, 2025 to Jul 30, 2026(301 of 303 days covered by obs)
NOAA Normal
31.10"
Departure from Normal
3.95" : 113% 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