Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 63°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Tuesday
24th Mar
63

39

8

6
Wednesday
25th Mar
77

50

10

7
Thursday
26th Mar
55

32

0

3
Friday
27th Mar
48

28

12

7
Saturday
28th Mar
63

34

9

6

5-day weather forecast updated at 04:03 on Tuesday 24th March 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 Tuesday 24th March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 63°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the north-west.

63
°F maximum temperature
39
°F minimum temperature
broken clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
4
mph wind from NW

Keystone weather for Wednesday 25th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 77°F, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the west.

77
°F maximum temperature
50
°F minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
77
°F wind chill
7
mph wind from W

Keystone weather for Thursday 26th March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 55°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north.

55
°F maximum temperature
32
°F minimum temperature
broken clouds
0
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
55
°F wind chill
11
mph wind from N

Keystone weather for Friday 27th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-west.

48
°F maximum temperature
28
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
46
°F wind chill
6
mph wind from NW

Keystone weather for Saturday 28th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 63°F, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south-east.