Viewing Station: CO-BO-621 : Boulder 2.7 SSE
May 5, 2026 - Sep 20, 2026102 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.37"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
0.96"
Departure from Normal
-0.59" : 39% of Normal
Year-To-Date: 5.71"
Jan 1 to Sep 20, 2026(102 of 263 days covered by obs)
NOAA Normal
14.68"
Departure from Normal
-8.97" : 39% of Normal
Water Year-To-Date: 5.71"
Oct 1, 2025 to Sep 20, 2026(102 of 355 days covered by obs)
NOAA Normal
17.69"
Departure from Normal
-11.98" : 32% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.66
0.68
-0.02
Feb
0.81
0.80
0.01
Mar
1.72
1.72
0.00
Apr
2.56
2.60
-0.04
May
2.74
2.90
-0.16
Jun
1.80
1.80
0.00
Jul
1.73
1.71
0.02
Aug
1.70
1.51
0.19
Sep
1.44
2.01
-0.57
Oct
1.32
1.45
-0.13
Nov
1.03
0.99
0.04
Dec
0.66
0.68
-0.02
18.17
18.85
-0.68