Viewing Station: CO-BO-477 : Boulder 2.3 N
Jun 23, 2017 - Sep 16, 20252,806 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.44"
September 1-17, 2025(16 of 17 days covered by obs)
NOAA Normal
0.85"
Departure from Normal
-0.41" : 52% of Normal
Year-To-Date: 12.10"
Jan 1 to Sep 17, 2025(249 of 260 days covered by obs)
NOAA Normal
14.63"
Departure from Normal
-2.53" : 83% of Normal
Water Year-To-Date: 14.68"
Oct 1, 2024 to Sep 17, 2025(341 of 352 days covered by obs)
NOAA Normal
17.59"
Departure from Normal
-2.91" : 83% 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