Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 48°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
31st Jan
48

27

8

1
Sunday
1st Feb
50

34

5

2
Monday
2nd Feb
46

34

7

2
Tuesday
3rd Feb
43

32

4

1
Wednesday
4th Feb
46

28

9

2

5-day weather forecast updated at 04:03 on Sunday 1st February 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 31st January 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 6% chance of some sleet or snow and a moderate breeze of 13 mph from the north-west.

48
°F maximum temperature
27
°F minimum temperature
cloudy with sleet or snow
8
hours of sunshine
1
UV index (Low)
6
% chance of some sleet or snow
<2
mm of sleet/snow expected
43
°F wind chill
13
mph wind from NW

Keystone weather for Sunday 1st February 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 50°F, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the west.

50
°F maximum temperature
34
°F minimum temperature
broken clouds
5
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
48
°F wind chill
6
mph wind from W

Keystone weather for Monday 2nd February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 46°F, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north-west.

46
°F maximum temperature
34
°F minimum temperature
scattered clouds
7
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
41
°F wind chill
11
mph wind from NW

Keystone weather for Tuesday 3rd February 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 43°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 4% chance of some rain and a gentle breeze of 10 mph from the north-west.

43
°F maximum temperature
32
°F minimum temperature
sunshine and showers
4
hours of sunshine
1
UV index (Low)
4
% chance of some rain
<2
mm of rainfall expected
37
°F wind chill
10
mph wind from NW

Keystone weather for Wednesday 4th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 46°F, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.