Viewing Station: IL-LK-103 : Buffalo Grove 1.3 ESE
Apr 22, 2018 - Sep 16, 20263,025 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.14"
September 1-16, 2026(16 of 16 days covered by obs)
NOAA Normal
1.77"
Departure from Normal
-0.63" : 65% of Normal
Year-To-Date: 29.03"
Jan 1 to Sep 16, 2026(259 of 259 days covered by obs)
NOAA Normal
27.92"
Departure from Normal
1.11" : 104% of Normal
Water Year-To-Date: 35.18"
Oct 1, 2025 to Sep 16, 2026(351 of 351 days covered by obs)
NOAA Normal
35.58"
Departure from Normal
-0.40" : 99% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.87
1.95
-0.08
Feb
1.76
1.89
-0.13
Mar
2.22
2.25
-0.03
Apr
3.74
3.69
0.05
May
4.30
4.45
-0.15
Jun
4.56
4.25
0.31
Jul
3.85
3.61
0.24
Aug
3.85
3.83
0.02
Sep
3.31
3.27
0.04
Oct
3.19
3.24
-0.05
Nov
2.42
2.36
0.06
Dec
2.05
2.08
-0.03
37.12
36.87
0.25