Viewing Station: CO-BO-490 : Boulder 1.5 WNW
Nov 12, 2017 - Sep 15, 20252,743 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.24"
September 1-17, 2025(15 of 17 days covered by obs)
NOAA Normal
0.87"
Departure from Normal
-0.63" : 28% of Normal
Year-To-Date: 11.71"
Jan 1 to Sep 17, 2025(256 of 260 days covered by obs)
NOAA Normal
14.73"
Departure from Normal
-3.02" : 80% of Normal
Water Year-To-Date: 14.34"
Oct 1, 2024 to Sep 17, 2025(348 of 352 days covered by obs)
NOAA Normal
17.74"
Departure from Normal
-3.40" : 81% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.65
0.66
-0.01
Feb
0.85
0.85
0.00
Mar
1.74
1.78
-0.04
Apr
2.56
2.68
-0.12
May
2.76
2.99
-0.23
Jun
1.86
1.96
-0.10
Jul
1.77
1.67
0.10
Aug
1.67
1.56
0.11
Sep
1.53
2.03
-0.50
Oct
1.36
1.52
-0.16
Nov
1.00
0.97
0.03
Dec
0.65
0.70
-0.05
18.40
19.37
-0.97