Viewing Station: IL-WL-166 : Naperville 3.6 SE
Jul 1, 2020 - Aug 24, 20261,906 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 8.36"
August 1-24, 2026(24 of 24 days covered by obs)
NOAA Normal
3.15"
Departure from Normal
5.21" : 265% of Normal
Year-To-Date: 37.75"
Jan 1 to Aug 24, 2026(234 of 236 days covered by obs)
NOAA Normal
26.13"
Departure from Normal
11.62" : 144% of Normal
Water Year-To-Date: 44.74"
Oct 1, 2025 to Aug 24, 2026(326 of 328 days covered by obs)
NOAA Normal
34.38"
Departure from Normal
10.36" : 130% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.02
2.06
-0.04
Feb
1.81
1.91
-0.10
Mar
2.37
2.35
0.02
Apr
3.89
3.86
0.03
May
4.56
4.67
-0.11
Jun
4.45
4.43
0.02
Jul
3.88
3.96
-0.08
Aug
4.07
3.95
0.12
Sep
3.25
3.23
0.02
Oct
3.48
3.47
0.01
Nov
2.61
2.55
0.06
Dec
2.16
2.14
0.02
38.55
38.58
-0.03