Viewing Station: SD-LW-24 : Spearfish 6.7 NNW
Feb 5, 2018 - May 16, 20262,963 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.13"
May 1-18, 2026(16 of 18 days covered by obs)
NOAA Normal
2.19"
Departure from Normal
-2.06" : 6% of Normal
Year-To-Date: 2.43"
Jan 1 to May 18, 2026(136 of 138 days covered by obs)
NOAA Normal
6.87"
Departure from Normal
-4.44" : 35% of Normal
Water Year-To-Date: 7.11"
Oct 1, 2025 to May 18, 2026(226 of 230 days covered by obs)
NOAA Normal
10.26"
Departure from Normal
-3.15" : 69% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.60
0.54
0.06
Feb
0.80
0.75
0.05
Mar
1.05
1.11
-0.06
Apr
2.23
2.19
0.04
May
3.77
3.51
0.26
Jun
3.40
3.28
0.12
Jul
2.26
2.17
0.09
Aug
1.74
1.73
0.01
Sep
1.44
1.44
0.00
Oct
1.90
1.85
0.05
Nov
0.83
0.71
0.12
Dec
0.66
0.66
0.00
20.68
19.94
0.74