Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 13°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
26th Dec
13

7

7

1
Saturday
27th Dec
9

-5

6

1
Sunday
28th Dec
-5

-10

9

1
Monday
29th Dec
4

-9

7

1
Tuesday
30th Dec
8

1

8

1

5-day weather forecast updated at 04:04 on Thursday 25th 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 Friday 26th December 2025

Expect clear skies in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the west.

13
°C maximum temperature
7
°C minimum temperature
clear skies
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
13
°C wind chill
23
kph wind from W

Keystone weather for Saturday 27th December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the west.

9
°C maximum temperature
-5
°C minimum temperature
broken clouds
6
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
6
°C wind chill
18
kph wind from W

Keystone weather for Sunday 28th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of -5°C, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 17 kph from the north-west.

-5
°C maximum temperature
-10
°C minimum temperature
scattered clouds
9
hours of sunshine
1
UV index (Low)
0
cm of snow expected
-11
°C wind chill
17
kph wind from NW

Keystone weather for Monday 29th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 4°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

4
°C maximum temperature
-9
°C minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
1
°C wind chill
12
kph wind from W

Keystone weather for Tuesday 30th December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 8°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.