Hourly Weather Forecast - Keystone, SD

12 AM
29°F
10%
19mph
WNW
Clear
Humidity
50%
Feels like
17°F
Dew Point
13°F
1 AM
27°F
20%
21mph
WNW
Windy
Humidity
51%
Feels like
14°F
Dew Point
11°F
2 AM
25°F
10%
21mph
WNW
Windy
Humidity
52%
Feels like
10°F
Dew Point
10°F
3 AM
23°F
10%
21mph
NW
Windy
Humidity
56%
Feels like
7°F
Dew Point
9°F
4 AM
21°F
10%
20mph
NW
Windy
Humidity
56%
Feels like
6°F
Dew Point
8°F
5 AM
20°F
10%
20mph
NW
Clear
Humidity
59%
Feels like
4°F
Dew Point
8°F
6 AM
19°F
10%
19mph
NW
Clear
Humidity
53%
Feels like
4°F
Dew Point
5°F
7 AM
19°F
10%
17mph
NW
Clear
Humidity
53%
Feels like
4°F
Dew Point
5°F
7:23 AM
8 AM
21°F
10%
15mph
NW
Sunny
Humidity
48%
Feels like
8°F
Dew Point
5°F
9 AM
24°F
10%
13mph
NW
Sunny
Humidity
45%
Feels like
12°F
Dew Point
6°F
10 AM
27°F
10%
12mph
NW
Sunny
Humidity
42%
Feels like
16°F
Dew Point
7°F
11 AM
29°F
0%
10mph
NW
Sunny
Humidity
39%
Feels like
20°F
Dew Point
7°F
12 PM
30°F
0%
9mph
NW
Sunny
Humidity
37%
Feels like
22°F
Dew Point
7°F
1 PM
30°F
0%
8mph
WNW
Sunny
Humidity
37%
Feels like
22°F
Dew Point
7°F
2 PM
29°F
0%
8mph
W
Sunny
Humidity
41%
Feels like
21°F
Dew Point
8°F
3 PM
27°F
0%
5mph
WSW
Sunny
Humidity
45%
Feels like
21°F
Dew Point
8°F
4 PM
25°F
0%
4mph
SSW
Sunny
Humidity
52%
Feels like
20°F
Dew Point
10°F
4:17 PM
5 PM
23°F
10%
5mph
S
Clear
Humidity
59%
Feels like
16°F
Dew Point
11°F
6 PM
22°F
10%
6mph
S
Clear
Humidity
61%
Feels like
15°F
Dew Point
11°F
7 PM
22°F
10%
6mph
S
Mostly Clear
Humidity
58%
Feels like
14°F
Dew Point
10°F
8 PM
23°F
10%
7mph
S
Mostly Clear
Humidity
56%
Feels like
15°F
Dew Point
10°F
9 PM
24°F
10%
8mph
SSW
Mostly Clear
Humidity
55%
Feels like
15°F
Dew Point
10°F
10 PM
25°F
10%
9mph
SSW
Mostly Clear
Humidity
54%
Feels like
16°F
Dew Point
11°F
11 PM
27°F
10%
9mph
SSW
Partly Cloudy
Humidity
51%
Feels like
18°F
Dew Point
11°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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