Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 61°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Wednesday
24th Dec
61

50

8

1
Thursday
25th Dec
61

46

2

1
Friday
26th Dec
55

45

8

1
Saturday
27th Dec
45

21

8

1
Sunday
28th Dec
27

16

9

1

5-day weather forecast updated at 04:03 on Wednesday 24th December 2025 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 Wednesday 24th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 61°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the west.

61
°F maximum temperature
50
°F minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
61
°F wind chill
10
mph wind from W

Keystone weather for Thursday 25th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 61°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the west.

61
°F maximum temperature
46
°F minimum temperature
scattered clouds
2
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
61
°F wind chill
16
mph wind from W

Keystone weather for Friday 26th December 2025

Expect clear skies in Keystone, South Dakota with a maximum temperature of 55°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the west.

55
°F maximum temperature
45
°F minimum temperature
clear skies
8
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
55
°F wind chill
14
mph wind from W

Keystone weather for Saturday 27th December 2025

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of 45°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0-2 cm of snow expected with 10% chance of some snow and a gentle breeze of 11 mph from the north-west.

45
°F maximum temperature
21
°F minimum temperature
clear skies with flurries of snow
8
hours of sunshine
1
UV index (Low)
10
% chance of some snow
<2
cm of snow expected
39
°F wind chill
11
mph wind from NW

Keystone weather for Sunday 28th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 27°F, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 9 mph from the north-west.