Viewing Station: IL-LV-21 : Chatsworth 1.2 S
Jun 8, 2018 - Sep 21, 20262,547 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.24"
September 1-22, 2026(21 of 22 days covered by obs)
NOAA Normal
2.45"
Departure from Normal
-0.21" : 91% of Normal
Year-To-Date: 33.42"
Jan 1 to Sep 22, 2026(254 of 265 days covered by obs)
NOAA Normal
29.63"
Departure from Normal
3.79" : 113% of Normal
Water Year-To-Date: 37.76"
Oct 1, 2025 to Sep 22, 2026(346 of 357 days covered by obs)
NOAA Normal
37.76"
Departure from Normal
0.00" : 100% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.11
2.22
-0.11
Feb
1.84
1.87
-0.03
Mar
2.53
2.60
-0.07
Apr
3.68
3.56
0.12
May
4.35
4.42
-0.07
Jun
4.64
4.58
0.06
Jul
4.34
4.45
-0.11
Aug
3.69
3.61
0.08
Sep
3.34
3.01
0.33
Oct
3.25
3.21
0.04
Nov
2.74
2.67
0.07
Dec
2.14
2.15
-0.01
38.65
38.35
0.30