Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 46°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Wednesday
14th Jan
46

34

5

1
Thursday
15th Jan
46

27

7

1
Friday
16th Jan
27

23

6

1
Saturday
17th Jan
32

21

2

1
Sunday
18th Jan
41

28

9

1

5-day weather forecast updated at 04:04 on Wednesday 14th January 2026 GMT

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The 5-day weather forecast for South Dakota (Keystone) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Keystone weather forecast by day

Below are the detailed weather forecasts for Keystone for the next 5 days.

Keystone weather for Wednesday 14th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 46°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 12 mph from the north-west.

46
°F maximum temperature
34
°F minimum temperature
scattered clouds
5
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
41
°F wind chill
12
mph wind from NW

Keystone weather for Thursday 15th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 46°F, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 23 mph from the north-west.

46
°F maximum temperature
27
°F minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
37
°F wind chill
23
mph wind from NW

Keystone weather for Friday 16th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 27°F, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a strong breeze of 27 mph from the north-west.

27
°F maximum temperature
23
°F minimum temperature
scattered clouds
6
hours of sunshine
1
UV index (Low)
0
cm of snow expected
10
°F wind chill
27
mph wind from NW

Keystone weather for Saturday 17th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 32°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 14 mph from the north-west.

32
°F maximum temperature
21
°F minimum temperature
scattered clouds
2
hours of sunshine
1
UV index (Low)
0
cm of snow expected
21
°F wind chill
14
mph wind from NW

Keystone weather for Sunday 18th January 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 41°F, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the north-west.