Viewing Station: CO-BO-469 : Niwot 2.2 SW
Oct 22, 2016 - Sep 18, 20263,036 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.17"
September 1-20, 2026(16 of 20 days covered by obs)
NOAA Normal
0.95"
Departure from Normal
-0.78" : 18% of Normal
Year-To-Date: 6.59"
Jan 1 to Sep 20, 2026(257 of 263 days covered by obs)
NOAA Normal
14.31"
Departure from Normal
-7.72" : 46% of Normal
Water Year-To-Date: 7.81"
Oct 1, 2025 to Sep 20, 2026(341 of 355 days covered by obs)
NOAA Normal
17.07"
Departure from Normal
-9.26" : 46% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.60
0.55
0.05
Feb
0.71
0.66
0.05
Mar
1.58
1.48
0.10
Apr
2.41
2.16
0.25
May
2.82
2.52
0.30
Jun
1.84
1.62
0.22
Jul
1.70
1.49
0.21
Aug
1.70
1.33
0.37
Sep
1.42
1.71
-0.29
Oct
1.26
1.21
0.05
Nov
0.92
0.82
0.10
Dec
0.58
0.56
0.02
17.54
16.11
1.43