Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 50°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Thursday
26th Feb
50

32

11

3
Friday
27th Feb
54

30

7

4
Saturday
28th Feb
39

21

6

4
Sunday
1st Mar
39

21

1

4
Monday
2nd Mar
52

28

0

3

5-day weather forecast updated at 04:05 on Thursday 26th 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 Thursday 26th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 50°F, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the west.

50
°F maximum temperature
32
°F minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
46
°F wind chill
10
mph wind from W

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
30
°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 39°F, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-east.

39
°F maximum temperature
21
°F minimum temperature
scattered clouds
6
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
34
°F wind chill
6
mph wind from NE

Keystone weather for Sunday 1st March 2026

Expect overcast skies in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the east.

39
°F maximum temperature
21
°F minimum temperature
overcast skies
1
hour of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
37
°F wind chill
4
mph wind from E

Keystone weather for Monday 2nd March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.