Hourly Weather Forecast - Keystone, SD

2 AM
22°F
0%
6mph
SW
Mostly Clear
Humidity
79%
Feels like
14°F
Dew Point
16°F
3 AM
24°F
0%
6mph
SW
Mostly Clear
Humidity
77%
Feels like
17°F
Dew Point
18°F
4 AM
27°F
0%
7mph
WSW
Clear
Humidity
70%
Feels like
20°F
Dew Point
19°F
5 AM
29°F
0%
8mph
W
Clear
Humidity
67%
Feels like
21°F
Dew Point
20°F
6 AM
31°F
0%
8mph
W
Mostly Clear
Humidity
56%
Feels like
24°F
Dew Point
17°F
7 AM
33°F
0%
8mph
W
Clear
Humidity
51%
Feels like
26°F
Dew Point
17°F
7:20 AM
8 AM
37°F
0%
8mph
W
Sunny
Humidity
44%
Feels like
31°F
Dew Point
17°F
9 AM
41°F
0%
7mph
W
Sunny
Humidity
40%
Feels like
37°F
Dew Point
19°F
10 AM
47°F
0%
7mph
W
Sunny
Humidity
37%
Feels like
43°F
Dew Point
22°F
11 AM
51°F
0%
6mph
W
Mostly Sunny
Humidity
35%
Feels like
51°F
Dew Point
24°F
12 PM
54°F
0%
7mph
W
Mostly Sunny
Humidity
32%
Feels like
54°F
Dew Point
24°F
1 PM
54°F
0%
7mph
W
Mostly Sunny
Humidity
31%
Feels like
54°F
Dew Point
24°F
2 PM
53°F
0%
8mph
W
Partly Cloudy
Humidity
32%
Feels like
53°F
Dew Point
24°F
3 PM
50°F
0%
9mph
W
Mostly Sunny
Humidity
32%
Feels like
46°F
Dew Point
22°F
4 PM
46°F
0%
9mph
W
Mostly Sunny
Humidity
33%
Feels like
42°F
Dew Point
19°F
4:15 PM
5 PM
44°F
0%
10mph
W
Mostly Clear
Humidity
33%
Feels like
39°F
Dew Point
17°F
6 PM
43°F
0%
10mph
W
Clear
Humidity
33%
Feels like
37°F
Dew Point
16°F
7 PM
43°F
0%
9mph
W
Clear
Humidity
32%
Feels like
37°F
Dew Point
15°F
8 PM
43°F
0%
9mph
W
Clear
Humidity
32%
Feels like
38°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%
8mph
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
13°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

In the path of a weak low-pressure system that brings snow to the Midwest and Northeast, extreme cold weather and brutally cold wind chill values will bring a bitter cold to much of the Nation.

Snowfall forecast through Sunday evening.

Snow Spreads Across the Ohio Valley into the Mid-Atlantic

Weekend Weather Outlook

Weekend 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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