Viewing Station: CO-BO-496 : Boulder 1.5 NNW
Mar 15, 2018 - Sep 17, 20252,373 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.63"
September 1-17, 2025(14 of 17 days covered by obs)
NOAA Normal
0.85"
Departure from Normal
-0.22" : 74% of Normal
Year-To-Date: 11.53"
Jan 1 to Sep 17, 2025(221 of 260 days covered by obs)
NOAA Normal
14.50"
Departure from Normal
-2.97" : 80% of Normal
Water Year-To-Date: 13.97"
Oct 1, 2024 to Sep 17, 2025(299 of 352 days covered by obs)
NOAA Normal
17.32"
Departure from Normal
-3.35" : 81% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.61
0.64
-0.03
Feb
0.80
0.79
0.01
Mar
1.68
1.69
-0.01
Apr
2.48
2.55
-0.07
May
2.78
2.88
-0.10
Jun
1.87
1.86
0.01
Jul
1.77
1.62
0.15
Aug
1.66
1.53
0.13
Sep
1.50
1.96
-0.46
Oct
1.29
1.43
-0.14
Nov
0.92
0.94
-0.02
Dec
0.61
0.66
-0.05
17.97
18.55
-0.58