Viewing Station: IL-CK-322 : Arlington Heights 0.8 NNW
Mar 24, 2020 - Aug 24, 20261,782 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.01"
August 1-25, 2026(23 of 25 days covered by obs)
NOAA Normal
3.12"
Departure from Normal
0.89" : 128% of Normal
Year-To-Date: 28.47"
Jan 1 to Aug 25, 2026(228 of 237 days covered by obs)
NOAA Normal
25.63"
Departure from Normal
2.84" : 111% of Normal
Water Year-To-Date: 34.22"
Oct 1, 2025 to Aug 25, 2026(319 of 329 days covered by obs)
NOAA Normal
33.32"
Departure from Normal
0.90" : 103% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.87
1.96
-0.09
Feb
1.76
1.90
-0.14
Mar
2.25
2.23
0.02
Apr
3.76
3.69
0.07
May
4.41
4.52
-0.11
Jun
4.59
4.26
0.33
Jul
3.87
3.60
0.27
Aug
3.87
3.92
-0.05
Sep
3.33
3.25
0.08
Oct
3.21
3.23
-0.02
Nov
2.41
2.35
0.06
Dec
2.07
2.09
-0.02
37.40
37.00
0.40