Viewing Station: IL-LS-1 : Ottawa 1.3 NW
Dec 8, 2006 - May 9, 20256,933 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.83"
May 1-9, 2025(9 of 9 days covered by obs)
NOAA Normal
1.30"
Departure from Normal
-0.47" : 64% of Normal
Year-To-Date: 10.36"
Jan 1 to May 9, 2025(129 of 129 days covered by obs)
NOAA Normal
10.74"
Departure from Normal
-0.38" : 96% of Normal
Water Year-To-Date: 16.42"
Oct 1, 2024 to May 9, 2025(221 of 221 days covered by obs)
NOAA Normal
18.22"
Departure from Normal
-1.80" : 90% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.92
1.90
0.02
Feb
1.75
1.79
-0.04
Mar
2.24
2.38
-0.14
Apr
3.53
3.53
0.00
May
4.47
4.56
-0.09
Jun
4.37
4.43
-0.06
Jul
3.77
3.78
-0.01
Aug
3.64
3.74
-0.10
Sep
3.21
3.29
-0.08
Oct
3.06
3.11
-0.05
Nov
2.46
2.61
-0.15
Dec
1.96
2.06
-0.10
36.38
37.18
-0.80