Viewing Station: CO-BO-490 : Boulder 1.5 WNW
Nov 12, 2017 - Sep 20, 20263,092 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.67"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
1.02"
Departure from Normal
-0.35" : 66% of Normal
Year-To-Date: 8.81"
Jan 1 to Sep 20, 2026(261 of 263 days covered by obs)
NOAA Normal
14.88"
Departure from Normal
-6.07" : 59% of Normal
Water Year-To-Date: 10.22"
Oct 1, 2025 to Sep 20, 2026(353 of 355 days covered by obs)
NOAA Normal
17.89"
Departure from Normal
-7.67" : 57% 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