Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 46°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
28th Feb
46

23

8

4
Sunday
1st Mar
45

23

9

4
Monday
2nd Mar
54

34

2

3
Tuesday
3rd Mar
54

36

11

4
Wednesday
4th Mar
61

39

6

4

5-day weather forecast updated at 04:05 on Saturday 28th 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 28th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 46°F, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the north-west.

46
°F maximum temperature
23
°F minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
43
°F wind chill
9
mph wind from NW

Keystone weather for Sunday 1st March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 45°F, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the south.

45
°F maximum temperature
23
°F minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
41
°F wind chill
5
mph wind from S

Keystone weather for Monday 2nd March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the west.

54
°F maximum temperature
34
°F minimum temperature
broken clouds
2
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
4
mph wind from W

Keystone weather for Tuesday 3rd March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-west.

54
°F maximum temperature
36
°F minimum temperature
scattered clouds
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
54
°F wind chill
6
mph wind from NW

Keystone weather for Wednesday 4th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 61°F, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south-west.