Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 39°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
25th Apr
39

25

4

2
Sunday
26th Apr
36

30

0

2
Monday
27th Apr
41

32

0

4
Tuesday
28th Apr
43

32

2

2
Wednesday
29th Apr
52

34

6

6

5-day weather forecast updated at 04:02 on Sunday 26th 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 Saturday 25th 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 4 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 38% chance of some sleet or snow and a light breeze of 6 mph from the south.

39
°F maximum temperature
25
°F minimum temperature
cloudy with sleet or snow
4
hours of sunshine
2
UV index (Low)
38
% chance of some sleet or snow
<2
mm of sleet/snow expected
34
°F wind chill
6
mph wind from S

Keystone weather for Sunday 26th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 36°F, maximum UV of 2 (Low) and no hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 97% chance of some sleet or snow and a light breeze of 5 mph from the south-east.

36
°F maximum temperature
30
°F minimum temperature
cloudy with sleet or snow
0
hours of sunshine
2
UV index (Low)
97
% chance of some sleet or snow
<10
mm of sleet/snow expected
32
°F wind chill
5
mph wind from SE

Keystone weather for Monday 27th April 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 41°F, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 2-5 cm of snow expected with 24% chance of some snow and a gentle breeze of 10 mph from the north.

41
°F maximum temperature
32
°F minimum temperature
mostly cloudy with light snow
0
hours of sunshine
4
UV index (Moderate)
24
% chance of some snow
<5
cm of snow expected
34
°F wind chill
10
mph wind from N

Keystone weather for Tuesday 28th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 43°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 89% chance of some sleet or snow and little or no wind of 4 mph from the south-east.

43
°F maximum temperature
32
°F minimum temperature
cloudy with sleet or snow
2
hours of sunshine
2
UV index (Low)
89
% chance of some sleet or snow
<10
mm of sleet/snow expected
41
°F wind chill
4
mph wind from SE

Keystone weather for Wednesday 29th April 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 34% chance of some rain and a light breeze of 6 mph from the north.