Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 10°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Wednesday
4th Feb
10

-2

6

2
Thursday
5th Feb
16

7

10

2
Friday
6th Feb
13

3

10

3
Saturday
7th Feb
13

5

2

2
Sunday
8th Feb
15

4

10

2

5-day weather forecast updated at 04:06 on Wednesday 4th February 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 Wednesday 4th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 10°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

10
°C maximum temperature
-2
°C minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
7
°C wind chill
16
kph wind from NW

Keystone weather for Thursday 5th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 16°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

16
°C maximum temperature
7
°C minimum temperature
clear skies
10
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
16
°C wind chill
16
kph wind from NW

Keystone weather for Friday 6th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south.

13
°C maximum temperature
3
°C minimum temperature
clear skies
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
13
°C wind chill
10
kph wind from S

Keystone weather for Saturday 7th February 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

13
°C maximum temperature
5
°C minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from NW

Keystone weather for Sunday 8th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 15°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the west.