Viewing Station: CO-BO-465 : Boulder 1.8 NW
Jun 11, 2017 - Sep 13, 20263,377 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.45"
September 1-13, 2026(13 of 13 days covered by obs)
NOAA Normal
0.65"
Departure from Normal
-0.20" : 69% of Normal
Year-To-Date: 9.37"
Jan 1 to Sep 13, 2026(256 of 256 days covered by obs)
NOAA Normal
14.30"
Departure from Normal
-4.93" : 66% of Normal
Water Year-To-Date: 10.84"
Oct 1, 2025 to Sep 13, 2026(350 of 348 days covered by obs)
NOAA Normal
17.12"
Departure from Normal
-6.28" : 63% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.61
0.65
-0.04
Feb
0.80
0.86
-0.06
Mar
1.68
1.78
-0.10
Apr
2.48
2.66
-0.18
May
2.78
3.00
-0.22
Jun
1.87
1.97
-0.10
Jul
1.77
1.67
0.10
Aug
1.66
1.58
0.08
Sep
1.50
2.02
-0.52
Oct
1.29
1.55
-0.26
Nov
0.92
0.95
-0.03
Dec
0.61
0.71
-0.10
17.97
19.40
-1.43