Viewing Station: CO-BO-30 : Boulder 1.9 SE
Jul 27, 2001 - Sep 8, 20269,161 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.19"
September 1-10, 2026(8 of 10 days covered by obs)
NOAA Normal
0.48"
Departure from Normal
-0.29" : 40% of Normal
Year-To-Date: 8.39"
Jan 1 to Sep 10, 2026(247 of 253 days covered by obs)
NOAA Normal
14.20"
Departure from Normal
-5.81" : 59% of Normal
Water Year-To-Date: 9.80"
Oct 1, 2025 to Sep 10, 2026(339 of 345 days covered by obs)
NOAA Normal
17.21"
Departure from Normal
-7.41" : 57% 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