Viewing Station: CO-BO-30 : Boulder 1.9 SE
Jul 27, 2001 - Sep 17, 20258,809 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.09"
September 1-18, 2025(17 of 18 days covered by obs)
NOAA Normal
0.86"
Departure from Normal
0.23" : 126% of Normal
Year-To-Date: 15.51"
Jan 1 to Sep 18, 2025(260 of 261 days covered by obs)
NOAA Normal
14.58"
Departure from Normal
0.93" : 106% of Normal
Water Year-To-Date: 18.61"
Oct 1, 2024 to Sep 18, 2025(352 of 353 days covered by obs)
NOAA Normal
17.59"
Departure from Normal
1.02" : 106% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.66
0.70
-0.04
Feb
0.81
0.81
0.00
Mar
1.72
1.75
-0.03
Apr
2.56
2.66
-0.10
May
2.74
2.95
-0.21
Jun
1.80
1.83
-0.03
Jul
1.73
1.75
-0.02
Aug
1.70
1.54
0.16
Sep
1.44
2.06
-0.62
Oct
1.32
1.48
-0.16
Nov
1.03
1.01
0.02
Dec
0.66
0.69
-0.03
18.17
19.23
-1.06