Viewing Station: IL-LS-17 : Ottawa 1.6 N
May 15, 2007 - Aug 13, 20267,049 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 5.71"
August 1-13, 2026(13 of 13 days covered by obs)
NOAA Normal
1.53"
Departure from Normal
4.18" : 374% of Normal
Year-To-Date: 32.42"
Jan 1 to Aug 13, 2026(225 of 225 days covered by obs)
NOAA Normal
23.58"
Departure from Normal
8.84" : 138% of Normal
Water Year-To-Date: 39.08"
Oct 1, 2025 to Aug 13, 2026(317 of 317 days covered by obs)
NOAA Normal
31.06"
Departure from Normal
8.02" : 126% 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