Hourly Weather Forecast - Gann Valley, SD

8:00 AM
9 AM
21°F
0%
15mph
NNW
Mostly Sunny
Humidity
78%
Feels like
7°F
Dew Point
15°F
10 AM
21°F
0%
14mph
NNW
Mostly Sunny
Humidity
76%
Feels like
8°F
Dew Point
15°F
11 AM
22°F
0%
13mph
NNW
Partly Cloudy
Humidity
73%
Feels like
9°F
Dew Point
15°F
12 PM
22°F
0%
12mph
NNW
Mostly Sunny
Humidity
71%
Feels like
11°F
Dew Point
15°F
1 PM
23°F
0%
11mph
NW
Partly Cloudy
Humidity
69%
Feels like
12°F
Dew Point
15°F
2 PM
24°F
0%
9mph
NW
Mostly Cloudy
Humidity
68%
Feels like
14°F
Dew Point
15°F
3 PM
24°F
0%
7mph
NNW
Mostly Cloudy
Humidity
67%
Feels like
16°F
Dew Point
15°F
4 PM
24°F
0%
5mph
NNW
Mostly Cloudy
Humidity
69%
Feels like
18°F
Dew Point
15°F
4:57 PM
5 PM
24°F
0%
3mph
NNE
Cloudy
Humidity
71%
Feels like
19°F
Dew Point
16°F
6 PM
23°F
10%
4mph
ENE
Cloudy
Humidity
74%
Feels like
17°F
Dew Point
16°F
7 PM
22°F
10%
5mph
E
Cloudy
Humidity
77%
Feels like
16°F
Dew Point
16°F
8 PM
22°F
10%
6mph
ESE
Cloudy
Humidity
80%
Feels like
14°F
Dew Point
17°F
9 PM
21°F
10%
8mph
ESE
Cloudy
Humidity
82%
Feels like
12°F
Dew Point
17°F
10 PM
21°F
10%
9mph
ESE
Cloudy
Humidity
84%
Feels like
11°F
Dew Point
17°F
11 PM
21°F
30%
10mph
ESE
30% Chance of Snow
Humidity
85%
Feels like
10°F
Dew Point
17°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

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Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide