Hourly Weather Forecast - Keystone, SD

12 AM
43°F
0%
8mph
WNW
Clear
Humidity
30%
Feels like
38°F
Dew Point
14°F
1 AM
43°F
0%
8mph
WNW
Clear
Humidity
29%
Feels like
38°F
Dew Point
13°F
2 AM
42°F
0%
9mph
WNW
Clear
Humidity
31%
Feels like
37°F
Dew Point
14°F
3 AM
41°F
0%
8mph
WNW
Clear
Humidity
32%
Feels like
35°F
Dew Point
13°F
4 AM
40°F
0%
8mph
WNW
Clear
Humidity
32%
Feels like
35°F
Dew Point
13°F
5 AM
38°F
0%
7mph
WNW
Clear
Humidity
35%
Feels like
33°F
Dew Point
13°F
6 AM
38°F
0%
7mph
W
Clear
Humidity
33%
Feels like
32°F
Dew Point
11°F
7 AM
38°F
0%
7mph
W
Clear
Humidity
36%
Feels like
32°F
Dew Point
13°F
7:20 AM
8 AM
40°F
0%
6mph
W
Sunny
Humidity
34%
Feels like
36°F
Dew Point
14°F
9 AM
44°F
0%
5mph
WSW
Sunny
Humidity
34%
Feels like
41°F
Dew Point
18°F
10 AM
49°F
0%
4mph
SW
Mostly Sunny
Humidity
36%
Feels like
48°F
Dew Point
23°F
11 AM
53°F
0%
4mph
SSW
Mostly Sunny
Humidity
35%
Feels like
53°F
Dew Point
26°F
12 PM
55°F
0%
4mph
SSW
Mostly Sunny
Humidity
34%
Feels like
55°F
Dew Point
27°F
1 PM
55°F
0%
4mph
SW
Mostly Sunny
Humidity
37%
Feels like
55°F
Dew Point
29°F
2 PM
53°F
0%
5mph
SW
Sunny
Humidity
41%
Feels like
53°F
Dew Point
29°F
3 PM
49°F
0%
6mph
WSW
Mostly Sunny
Humidity
41%
Feels like
47°F
Dew Point
26°F
4 PM
45°F
0%
6mph
WSW
Mostly Sunny
Humidity
42%
Feels like
41°F
Dew Point
23°F
4:16 PM
5 PM
42°F
0%
8mph
W
Mostly Clear
Humidity
39%
Feels like
37°F
Dew Point
19°F
6 PM
41°F
0%
9mph
W
Mostly Clear
Humidity
37%
Feels like
36°F
Dew Point
17°F
7 PM
42°F
0%
9mph
W
Mostly Clear
Humidity
34%
Feels like
37°F
Dew Point
16°F
8 PM
43°F
0%
9mph
W
Mostly Clear
Humidity
33%
Feels like
38°F
Dew Point
16°F
9 PM
44°F
0%
9mph
W
Mostly Clear
Humidity
35%
Feels like
39°F
Dew Point
18°F
10 PM
44°F
0%
9mph
W
Mostly Clear
Humidity
36%
Feels like
40°F
Dew Point
19°F
11 PM
45°F
0%
8mph
W
Partly Cloudy
Humidity
37%
Feels like
40°F
Dew Point
20°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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