Viewing Station: CO-BO-4 : Boulder 2.9 S
Jun 1, 2001 - Dec 10, 20259,067 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.65"
December 1-11, 2025(10 of 11 days covered by obs)
NOAA Normal
0.25"
Departure from Normal
0.40" : 258% of Normal
Year-To-Date: 18.70"
Jan 1 to Dec 11, 2025(344 of 345 days covered by obs)
NOAA Normal
18.64"
Departure from Normal
0.06" : 100% of Normal
Water Year-To-Date: 1.32"
Oct 1, 2025 to Dec 11, 2025(71 of 72 days covered by obs)
NOAA Normal
2.68"
Departure from Normal
-1.36" : 49% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.71
0.74
-0.03
Feb
0.91
0.90
0.01
Mar
1.84
1.85
-0.01
Apr
2.72
2.79
-0.07
May
2.80
3.06
-0.26
Jun
1.88
1.92
-0.04
Jul
1.84
1.73
0.11
Aug
1.73
1.65
0.08
Sep
1.53
2.05
-0.52
Oct
1.37
1.54
-0.17
Nov
1.06
1.04
0.02
Dec
0.71
0.76
-0.05
19.10
20.03
-0.93