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.

Monday
12th Jan
13

4

7

1
Tuesday
13th Jan
10

3

4

0
Wednesday
14th Jan
7

2

5

1
Thursday
15th Jan
8

-2

8

1
Friday
16th Jan
-2

-5

7

1

5-day weather forecast updated at 04:05 on Monday 12th January 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 Monday 12th January 2026

Expect scattered clouds 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 gentle breeze of 17 kph from the west.

13
°C maximum temperature
4
°C minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
13
°C wind chill
17
kph wind from W

Keystone weather for Tuesday 13th January 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 10°C and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 51% chance of some rain and a moderate breeze of 23 kph from the north-west.

10
°C maximum temperature
3
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
0
UV index (None)
51
% chance of some rain
<2
mm of rainfall expected
6
°C wind chill
23
kph wind from NW

Keystone weather for Wednesday 14th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 7°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north-west.

7
°C maximum temperature
2
°C minimum temperature
scattered clouds
5
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
3
°C wind chill
21
kph wind from NW

Keystone weather for Thursday 15th January 2026

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 fresh breeze of 32 kph from the north-west.

8
°C maximum temperature
-2
°C minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
3
°C wind chill
32
kph wind from NW

Keystone weather for Friday 16th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -2°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 cm of snow expected with 6% chance of some snow and a fresh breeze of 36 kph from the north-west.