Viewing Station: WY-NT-115 : Casper 1.5 SW
Apr 21, 2026 - Sep 20, 2026142 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.38"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
0.67"
Departure from Normal
-0.29" : 57% of Normal
Year-To-Date: 6.78"
Jan 1 to Sep 20, 2026(153 of 263 days covered by obs)
NOAA Normal
9.42"
Departure from Normal
-2.64" : 72% of Normal
Water Year-To-Date: 6.78"
Oct 1, 2025 to Sep 20, 2026(153 of 355 days covered by obs)
NOAA Normal
11.61"
Departure from Normal
-4.83" : 58% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.53
0.71
-0.18
Feb
0.49
0.94
-0.45
Mar
0.76
1.30
-0.54
Apr
1.53
2.01
-0.48
May
2.24
2.97
-0.73
Jun
1.34
1.63
-0.29
Jul
1.02
1.22
-0.20
Aug
0.84
0.97
-0.13
Sep
1.00
1.14
-0.14
Oct
1.12
1.64
-0.52
Nov
0.56
0.82
-0.26
Dec
0.51
0.91
-0.40
11.94
16.26
-4.32