Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 54°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
27th Feb
54

34

7

4
Saturday
28th Feb
41

23

7

4
Sunday
1st Mar
45

23

3

4
Monday
2nd Mar
48

30

8

3
Tuesday
3rd Mar
52

34

11

3

5-day weather forecast updated at 04:05 on Friday 27th 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 Friday 27th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the north-west.

54
°F maximum temperature
34
°F minimum temperature
scattered clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from NW

Keystone weather for Saturday 28th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 41°F, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the east.

41
°F maximum temperature
23
°F minimum temperature
scattered clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
37
°F wind chill
6
mph wind from E

Keystone weather for Sunday 1st March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 45°F, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the south-east.

45
°F maximum temperature
23
°F minimum temperature
broken clouds
3
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
41
°F wind chill
4
mph wind from SE

Keystone weather for Monday 2nd March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.

48
°F maximum temperature
30
°F minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
46
°F wind chill
6
mph wind from S

Keystone weather for Tuesday 3rd March 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the east.