Viewing Station: CO-BO-409 : Boulder 1.4 SE
Apr 21, 2016 - Sep 16, 20253,210 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.62"
September 1-17, 2025(16 of 17 days covered by obs)
NOAA Normal
0.82"
Departure from Normal
-0.20" : 76% of Normal
Year-To-Date: 11.64"
Jan 1 to Sep 17, 2025(238 of 260 days covered by obs)
NOAA Normal
14.34"
Departure from Normal
-2.70" : 81% of Normal
Water Year-To-Date: 14.54"
Oct 1, 2024 to Sep 17, 2025(330 of 352 days covered by obs)
NOAA Normal
17.30"
Departure from Normal
-2.76" : 84% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.64
0.65
-0.01
Feb
0.78
0.80
-0.02
Mar
1.68
1.72
-0.04
Apr
2.49
2.53
-0.04
May
2.73
2.86
-0.13
Jun
1.82
1.71
0.11
Jul
1.71
1.65
0.06
Aug
1.67
1.41
0.26
Sep
1.44
2.02
-0.58
Oct
1.32
1.39
-0.07
Nov
1.00
0.97
0.03
Dec
0.64
0.63
0.01
17.92
18.34
-0.42