Viewing Station: CO-BO-248 : Niwot 2.3 W
Aug 13, 2007 - Sep 20, 20266,205 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.30"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
0.95"
Departure from Normal
-0.65" : 32% of Normal
Year-To-Date: 7.32"
Jan 1 to Sep 20, 2026(262 of 263 days covered by obs)
NOAA Normal
14.03"
Departure from Normal
-6.71" : 52% of Normal
Water Year-To-Date: 8.51"
Oct 1, 2025 to Sep 20, 2026(353 of 355 days covered by obs)
NOAA Normal
16.71"
Departure from Normal
-8.20" : 51% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.57
0.51
0.06
Feb
0.69
0.60
0.09
Mar
1.53
1.37
0.16
Apr
2.34
2.05
0.29
May
2.79
2.54
0.25
Jun
1.83
1.64
0.19
Jul
1.67
1.40
0.27
Aug
1.66
1.31
0.35
Sep
1.42
1.61
-0.19
Oct
1.25
1.15
0.10
Nov
0.87
0.77
0.10
Dec
0.56
0.51
0.05
17.18
15.46
1.72