Hourly Weather Forecast - Keystone, SD

9 AM
37°F
0%
8mph
W
Mostly Sunny
Humidity
51%
Feels like
32°F
Dew Point
21°F
10 AM
43°F
0%
7mph
W
Mostly Sunny
Humidity
45%
Feels like
39°F
Dew Point
23°F
11 AM
48°F
0%
7mph
W
Mostly Sunny
Humidity
40%
Feels like
45°F
Dew Point
25°F
12 PM
51°F
0%
7mph
W
Mostly Sunny
Humidity
35%
Feels like
51°F
Dew Point
25°F
1 PM
52°F
0%
7mph
W
Sunny
Humidity
33%
Feels like
52°F
Dew Point
25°F
2 PM
51°F
0%
8mph
W
Mostly Sunny
Humidity
34%
Feels like
51°F
Dew Point
24°F
3 PM
49°F
0%
9mph
W
Sunny
Humidity
33%
Feels like
45°F
Dew Point
21°F
4 PM
45°F
0%
9mph
W
Mostly Sunny
Humidity
34%
Feels like
41°F
Dew Point
19°F
4:15 PM
5 PM
43°F
0%
10mph
W
Mostly Clear
Humidity
34%
Feels like
37°F
Dew Point
17°F
6 PM
42°F
0%
10mph
W
Mostly Clear
Humidity
35%
Feels like
36°F
Dew Point
16°F
7 PM
42°F
0%
10mph
W
Mostly Clear
Humidity
33%
Feels like
37°F
Dew Point
15°F
8 PM
43°F
0%
10mph
W
Clear
Humidity
32%
Feels like
37°F
Dew Point
15°F
9 PM
43°F
0%
9mph
W
Clear
Humidity
32%
Feels like
38°F
Dew Point
15°F
10 PM
43°F
0%
9mph
WNW
Clear
Humidity
32%
Feels like
38°F
Dew Point
15°F
11 PM
43°F
0%
8mph
WNW
Clear
Humidity
30%
Feels like
38°F
Dew Point
14°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Sunday Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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