Viewing Station: CO-BO-9 : Boulder 1.4 NNW
Jun 11, 2001 - Sep 16, 20257,855 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.12"
September 1-18, 2025(16 of 18 days covered by obs)
NOAA Normal
0.92"
Departure from Normal
-0.80" : 13% of Normal
Year-To-Date: 13.37"
Jan 1 to Sep 18, 2025(246 of 261 days covered by obs)
NOAA Normal
14.78"
Departure from Normal
-1.41" : 90% of Normal
Water Year-To-Date: 16.65"
Oct 1, 2024 to Sep 18, 2025(335 of 353 days covered by obs)
NOAA Normal
17.79"
Departure from Normal
-1.14" : 94% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.65
0.76
-0.11
Feb
0.85
1.01
-0.16
Mar
1.74
1.89
-0.15
Apr
2.56
2.85
-0.29
May
2.76
3.30
-0.54
Jun
1.86
2.19
-0.33
Jul
1.77
1.72
0.05
Aug
1.67
1.64
0.03
Sep
1.53
2.11
-0.58
Oct
1.36
1.65
-0.29
Nov
1.00
1.09
-0.09
Dec
0.65
0.80
-0.15
18.40
21.01
-2.61