Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 54°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Thursday
11th Dec
54

32

6

0
Friday
12th Dec
32

16

0

0
Saturday
13th Dec
19

10

1

1
Sunday
14th Dec
52

21

6

2
Monday
15th Dec
54

37

6

1

5-day weather forecast updated at 04:04 on Thursday 11th 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 Thursday 11th December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 54°F and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the north-west.

54
°F maximum temperature
32
°F minimum temperature
broken clouds
6
hours of sunshine
0
UV index (None)
0
mm of rainfall expected
54
°F wind chill
14
mph wind from NW

Keystone weather for Friday 12th December 2025

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 32°F and no hours of bright sunshine. There are 2-5 cm of snow expected with 91% chance of some snow and a light breeze of 6 mph from the east.

32
°F maximum temperature
16
°F minimum temperature
mostly cloudy with light snow
0
hours of sunshine
0
UV index (None)
91
% chance of some snow
<5
cm of snow expected
27
°F wind chill
6
mph wind from E

Keystone weather for Saturday 13th December 2025

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 19°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 23% chance of some snow and a light breeze of 5 mph from the north-east.

19
°F maximum temperature
10
°F minimum temperature
mostly cloudy with light snow
1
hour of sunshine
1
UV index (Low)
23
% chance of some snow
<2
cm of snow expected
12
°F wind chill
5
mph wind from NE

Keystone weather for Sunday 14th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

52
°F maximum temperature
21
°F minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from W

Keystone weather for Monday 15th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.