Viewing Station: CO-BO-477 : Boulder 2.3 N
Jun 23, 2017 - Sep 13, 20263,126 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.46"
September 1-13, 2026(12 of 13 days covered by obs)
NOAA Normal
0.65"
Departure from Normal
-0.19" : 71% of Normal
Year-To-Date: 8.65"
Jan 1 to Sep 13, 2026(236 of 256 days covered by obs)
NOAA Normal
14.43"
Departure from Normal
-5.78" : 60% of Normal
Water Year-To-Date: 9.91"
Oct 1, 2025 to Sep 13, 2026(318 of 348 days covered by obs)
NOAA Normal
17.39"
Departure from Normal
-7.48" : 57% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.64
0.61
0.03
Feb
0.79
0.73
0.06
Mar
1.71
1.60
0.11
Apr
2.55
2.42
0.13
May
2.79
2.77
0.02
Jun
1.85
1.76
0.09
Jul
1.77
1.58
0.19
Aug
1.68
1.48
0.20
Sep
1.50
1.85
-0.35
Oct
1.37
1.34
0.03
Nov
0.97
0.90
0.07
Dec
0.62
0.62
0.00
18.24
17.66
0.58