Viewing Station: CO-BO-494 : Boulder 2.5 SW
Mar 25, 2018 - Sep 13, 20261,731 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.09"
September 1-13, 2026(12 of 13 days covered by obs)
NOAA Normal
0.66"
Departure from Normal
-0.57" : 14% of Normal
Year-To-Date: 8.09"
Jan 1 to Sep 13, 2026(178 of 256 days covered by obs)
NOAA Normal
14.52"
Departure from Normal
-6.43" : 56% of Normal
Water Year-To-Date: 8.86"
Oct 1, 2025 to Sep 13, 2026(221 of 348 days covered by obs)
NOAA Normal
17.53"
Departure from Normal
-8.67" : 51% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.65
0.80
-0.15
Feb
0.85
1.04
-0.19
Mar
1.74
1.97
-0.23
Apr
2.56
2.91
-0.35
May
2.76
3.25
-0.49
Jun
1.86
2.05
-0.19
Jul
1.77
1.75
0.02
Aug
1.67
1.77
-0.10
Sep
1.53
2.14
-0.61
Oct
1.36
1.61
-0.25
Nov
1.00
1.12
-0.12
Dec
0.65
0.82
-0.17
18.40
21.23
-2.83