Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 32°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
9th Jan
32

25

7

1
Saturday
10th Jan
37

28

3

1
Sunday
11th Jan
52

36

8

2
Monday
12th Jan
55

39

5

1
Tuesday
13th Jan
48

39

6

1

5-day weather forecast updated at 04:04 on Friday 9th 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 Friday 9th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of 32°F, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 cm of snow expected with 16% chance of some snow and a gentle breeze of 12 mph from the north-west.

32
°F maximum temperature
25
°F minimum temperature
clear skies with flurries of snow
7
hours of sunshine
1
UV index (Low)
16
% chance of some snow
<2
cm of snow expected
21
°F wind chill
12
mph wind from NW

Keystone weather for Saturday 10th January 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 37°F, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the north-west.

37
°F maximum temperature
28
°F minimum temperature
broken clouds
3
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
30
°F wind chill
12
mph wind from NW

Keystone weather for Sunday 11th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

52
°F maximum temperature
36
°F minimum temperature
scattered clouds
8
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
52
°F wind chill
8
mph wind from W

Keystone weather for Monday 12th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 55°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the west.

55
°F maximum temperature
39
°F minimum temperature
scattered clouds
5
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
55
°F wind chill
12
mph wind from W

Keystone weather for Tuesday 13th January 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a moderate breeze of 15 mph from the north-west.