Viewing Station: WY-LM-178 : Cheyenne 2.9 NNW
May 24, 2015 - Sep 20, 20261,229 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.34"
September 1-20, 2026(9 of 20 days covered by obs)
NOAA Normal
0.97"
Departure from Normal
-0.63" : 35% of Normal
Year-To-Date: 4.64"
Jan 1 to Sep 20, 2026(40 of 263 days covered by obs)
NOAA Normal
12.76"
Departure from Normal
-8.12" : 36% of Normal
Water Year-To-Date: 5.23"
Oct 1, 2025 to Sep 20, 2026(46 of 355 days covered by obs)
NOAA Normal
14.99"
Departure from Normal
-9.76" : 35% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.37
0.28
0.09
Feb
0.53
0.47
0.06
Mar
1.00
0.85
0.15
Apr
1.77
1.60
0.17
May
2.56
2.54
0.02
Jun
2.19
2.26
-0.07
Jul
1.93
1.90
0.03
Aug
1.44
1.66
-0.22
Sep
1.46
1.64
-0.18
Oct
1.09
1.01
0.08
Nov
0.62
0.57
0.05
Dec
0.52
0.47
0.05
15.48
15.25
0.23