Viewing Station: IL-BU-15 : Princeton 1.0 SSW
May 15, 2026 - Sep 21, 2026122 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.20"
September 1-23, 2026(21 of 23 days covered by obs)
NOAA Normal
2.78"
Departure from Normal
0.42" : 115% of Normal
Year-To-Date: 24.09"
Jan 1 to Sep 23, 2026(122 of 266 days covered by obs)
NOAA Normal
29.31"
Departure from Normal
-5.22" : 82% of Normal
Water Year-To-Date: 24.09"
Oct 1, 2025 to Sep 23, 2026(122 of 358 days covered by obs)
NOAA Normal
37.03"
Departure from Normal
-12.94" : 65% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.84
1.81
0.03
Feb
1.75
1.83
-0.08
Mar
2.48
2.33
0.15
Apr
3.75
3.75
0.00
May
4.75
4.77
-0.02
Jun
4.59
4.74
-0.15
Jul
3.74
3.74
0.00
Aug
3.63
3.71
-0.08
Sep
3.63
3.54
0.09
Oct
3.12
3.07
0.05
Nov
2.56
2.54
0.02
Dec
2.04
2.09
-0.05
37.88
37.92
-0.04