Viewing Station: IL-LS-17 : Ottawa 1.6 N
May 15, 2007 - Jul 18, 20256,655 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.75"
July 1-19, 2025(18 of 19 days covered by obs)
NOAA Normal
2.31"
Departure from Normal
-0.56" : 76% of Normal
Year-To-Date: 16.61"
Jan 1 to Jul 19, 2025(199 of 200 days covered by obs)
NOAA Normal
20.59"
Departure from Normal
-3.98" : 81% of Normal
Water Year-To-Date: 22.60"
Oct 1, 2024 to Jul 19, 2025(291 of 292 days covered by obs)
NOAA Normal
28.07"
Departure from Normal
-5.47" : 81% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.92
1.91
0.01
Feb
1.75
1.80
-0.05
Mar
2.24
2.38
-0.14
Apr
3.53
3.53
0.00
May
4.47
4.56
-0.09
Jun
4.37
4.45
-0.08
Jul
3.77
3.79
-0.02
Aug
3.64
3.75
-0.11
Sep
3.21
3.30
-0.09
Oct
3.06
3.12
-0.06
Nov
2.46
2.61
-0.15
Dec
1.96
2.07
-0.11
36.38
37.27
-0.89