Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 19°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
24th Jan
19

-8

6

2
Sunday
25th Jan
7

-2

5

2
Monday
26th Jan
37

3

9

2
Tuesday
27th Jan
37

23

8

2
Wednesday
28th Jan
39

25

2

2

5-day weather forecast updated at 04:04 on Saturday 24th 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 Saturday 24th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of 19°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 14% chance of some snow and a light breeze of 4 mph from the north-west.

19
°F maximum temperature
-8
°F minimum temperature
clear skies with flurries of snow
6
hours of sunshine
2
UV index (Low)
14
% chance of some snow
<2
cm of snow expected
14
°F wind chill
4
mph wind from NW

Keystone weather for Sunday 25th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of 7°F, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 11% chance of some snow and a light breeze of 6 mph from the north.

7
°F maximum temperature
-2
°F minimum temperature
clear skies with flurries of snow
5
hours of sunshine
2
UV index (Low)
11
% chance of some snow
<2
cm of snow expected
-4
°F wind chill
6
mph wind from N

Keystone weather for Monday 26th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 37°F, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the west.

37
°F maximum temperature
3
°F minimum temperature
scattered clouds
9
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
30
°F wind chill
11
mph wind from W

Keystone weather for Tuesday 27th January 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 37°F, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-west.

37
°F maximum temperature
23
°F minimum temperature
broken clouds
8
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
32
°F wind chill
6
mph wind from NW

Keystone weather for Wednesday 28th January 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the west.