Viewing Station: SD-CS-42 : Custer 21.4 W
Apr 28, 2024 - Sep 20, 2026849 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.14"
September 1-21, 2026(20 of 21 days covered by obs)
NOAA Normal
0.85"
Departure from Normal
1.29" : 253% of Normal
Year-To-Date: 11.22"
Jan 1 to Sep 21, 2026(251 of 264 days covered by obs)
NOAA Normal
14.62"
Departure from Normal
-3.40" : 77% of Normal
Water Year-To-Date: 14.50"
Oct 1, 2025 to Sep 21, 2026(343 of 356 days covered by obs)
NOAA Normal
17.10"
Departure from Normal
-2.60" : 85% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.52
0.56
-0.04
Feb
0.66
0.73
-0.07
Mar
0.80
0.87
-0.07
Apr
1.71
1.81
-0.10
May
2.83
3.02
-0.19
Jun
2.90
3.17
-0.27
Jul
2.59
2.77
-0.18
Aug
1.76
2.06
-0.30
Sep
1.21
1.25
-0.04
Oct
1.29
1.45
-0.16
Nov
0.62
0.70
-0.08
Dec
0.57
0.58
-0.01
17.46
18.97
-1.51