Viewing Station: IL-DP-78 : Naperville 2.4 SE
Sep 1, 2009 - Aug 24, 20264,267 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 9.16"
August 1-24, 2026(24 of 24 days covered by obs)
NOAA Normal
3.15"
Departure from Normal
6.01" : 291% of Normal
Year-To-Date: 37.55"
Jan 1 to Aug 24, 2026(235 of 236 days covered by obs)
NOAA Normal
26.13"
Departure from Normal
11.42" : 144% of Normal
Water Year-To-Date: 44.21"
Oct 1, 2025 to Aug 24, 2026(326 of 328 days covered by obs)
NOAA Normal
34.38"
Departure from Normal
9.83" : 129% 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