Viewing Station: IL-WD-22 : Rock Falls 3.1 S
Dec 31, 2020 - Sep 19, 20261,913 Total Observations
View:

Climatology

Precipitation Normals Comparison

Month-To-Date: 4.33"
September 1-19, 2026(18 of 19 days covered by obs)
NOAA Normal
2.28"
Departure from Normal
2.05" : 190% of Normal
Year-To-Date: 32.36"
Jan 1 to Sep 19, 2026(254 of 262 days covered by obs)
NOAA Normal
29.40"
Departure from Normal
2.96" : 110% of Normal
Water Year-To-Date: 40.81"
Oct 1, 2025 to Sep 19, 2026(342 of 354 days covered by obs)
NOAA Normal
36.67"
Departure from Normal
4.14" : 111% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.64
1.68
-0.04
Feb
1.75
1.70
0.05
Mar
2.42
2.37
0.05
Apr
3.68
3.79
-0.11
May
4.64
4.83
-0.19
Jun
5.09
5.27
-0.18
Jul
3.94
4.17
-0.23
Aug
3.96
4.23
-0.27
Sep
3.60
3.65
-0.05
Oct
2.85
2.81
0.04
Nov
2.36
2.28
0.08
Dec
2.06
1.94
0.12
37.99
38.72
-0.73