Viewing Station: IL-CK-322 : Arlington Heights 0.8 NNW
Mar 24, 2020 - Apr 9, 20261,690 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.16"
April 1-9, 2026(9 of 9 days covered by obs)
NOAA Normal
1.13"
Departure from Normal
1.03" : 191% of Normal
Year-To-Date: 8.15"
Jan 1 to Apr 9, 2026(97 of 99 days covered by obs)
NOAA Normal
7.01"
Departure from Normal
1.14" : 116% of Normal
Water Year-To-Date: 13.90"
Oct 1, 2025 to Apr 9, 2026(188 of 191 days covered by obs)
NOAA Normal
14.70"
Departure from Normal
-0.80" : 95% 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