Viewing Station: CO-BO-409 : Boulder 1.4 SE
Apr 21, 2016 - Sep 13, 20263,557 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.14"
September 1-13, 2026(13 of 13 days covered by obs)
NOAA Normal
0.62"
Departure from Normal
-0.48" : 22% of Normal
Year-To-Date: 7.44"
Jan 1 to Sep 13, 2026(252 of 256 days covered by obs)
NOAA Normal
14.14"
Departure from Normal
-6.70" : 53% of Normal
Water Year-To-Date: 8.14"
Oct 1, 2025 to Sep 13, 2026(333 of 348 days covered by obs)
NOAA Normal
17.10"
Departure from Normal
-8.96" : 48% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.64
0.65
-0.01
Feb
0.78
0.80
-0.02
Mar
1.68
1.72
-0.04
Apr
2.49
2.53
-0.04
May
2.73
2.86
-0.13
Jun
1.82
1.71
0.11
Jul
1.71
1.65
0.06
Aug
1.67
1.41
0.26
Sep
1.44
2.02
-0.58
Oct
1.32
1.39
-0.07
Nov
1.00
0.97
0.03
Dec
0.64
0.63
0.01
17.92
18.34
-0.42