Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 57°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Tuesday
14th Apr
57

41

2

4
Wednesday
15th Apr
66

41

11

6
Thursday
16th Apr
68

41

3

6
Friday
17th Apr
39

27

0

2
Saturday
18th Apr
43

27

8

6

5-day weather forecast updated at 04:03 on Tuesday 14th April 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 14th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 57°F, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the west.

57
°F maximum temperature
41
°F minimum temperature
broken clouds
2
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
57
°F wind chill
4
mph wind from W

Keystone weather for Wednesday 15th April 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 66°F, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-west.

66
°F maximum temperature
41
°F minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
7
mph wind from SW

Keystone weather for Thursday 16th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 68°F, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the south-west.

68
°F maximum temperature
41
°F minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
68
°F wind chill
13
mph wind from SW

Keystone weather for Friday 17th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 64% chance of some sleet or snow and a gentle breeze of 12 mph from the north-west.

39
°F maximum temperature
27
°F minimum temperature
cloudy with sleet or snow
0
hours of sunshine
2
UV index (Low)
64
% chance of some sleet or snow
<5
mm of sleet/snow expected
32
°F wind chill
12
mph wind from NW

Keystone weather for Saturday 18th April 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 43°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the north-west.