Viewing Station: CO-BO-476 : Boulder 2.9 ESE
Jun 12, 2017 - Sep 13, 20262,301 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.15"
September 1-13, 2026(13 of 13 days covered by obs)
NOAA Normal
0.62"
Departure from Normal
-0.47" : 24% of Normal
Year-To-Date: 6.39"
Jan 1 to Sep 13, 2026(251 of 256 days covered by obs)
NOAA Normal
13.94"
Departure from Normal
-7.55" : 46% of Normal
Water Year-To-Date: 7.49"
Oct 1, 2025 to Sep 13, 2026(337 of 348 days covered by obs)
NOAA Normal
16.75"
Departure from Normal
-9.26" : 45% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.61
0.61
0.00
Feb
0.75
0.73
0.02
Mar
1.61
1.59
0.02
Apr
2.43
2.37
0.06
May
2.72
2.70
0.02
Jun
1.82
1.63
0.19
Jul
1.70
1.60
0.10
Aug
1.68
1.41
0.27
Sep
1.42
1.82
-0.40
Oct
1.28
1.34
-0.06
Nov
0.94
0.91
0.03
Dec
0.59
0.61
-0.02
17.55
17.32
0.23