Viewing Station: CO-BO-456 : Boulder 2.2 SSW
Jun 18, 2017 - Sep 13, 20263,236 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.09"
September 1-13, 2026(13 of 13 days covered by obs)
NOAA Normal
0.66"
Departure from Normal
-0.57" : 14% of Normal
Year-To-Date: 8.68"
Jan 1 to Sep 13, 2026(253 of 256 days covered by obs)
NOAA Normal
15.09"
Departure from Normal
-6.41" : 58% of Normal
Water Year-To-Date: 10.30"
Oct 1, 2025 to Sep 13, 2026(344 of 348 days covered by obs)
NOAA Normal
18.23"
Departure from Normal
-7.93" : 56% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.71
0.73
-0.02
Feb
0.91
0.90
0.01
Mar
1.84
1.83
0.01
Apr
2.72
2.72
0.00
May
2.80
3.05
-0.25
Jun
1.88
1.91
-0.03
Jul
1.84
1.72
0.12
Aug
1.73
1.64
0.09
Sep
1.53
2.03
-0.50
Oct
1.37
1.52
-0.15
Nov
1.06
1.05
0.01
Dec
0.71
0.74
-0.03
19.10
19.84
-0.74