Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 22°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Monday
15th Jun
22

8

10

8
Tuesday
16th Jun
26

12

6

6
Wednesday
17th Jun
21

12

14

9
Thursday
18th Jun
21

10

8

9
Friday
19th Jun
24

10

9

8

5-day weather forecast updated at 04:03 on Monday 15th June 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 15th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 22°C, maximum UV of 8 (Very High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

22
°C maximum temperature
8
°C minimum temperature
scattered clouds
10
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
22
°C wind chill
20
kph wind from NW

Keystone weather for Tuesday 16th June 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 26°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

26
°C maximum temperature
12
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
26
°C wind chill
15
kph wind from W

Keystone weather for Wednesday 17th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 21°C, maximum UV of 9 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the north-west.

21
°C maximum temperature
12
°C minimum temperature
scattered clouds
14
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
21
°C wind chill
27
kph wind from NW

Keystone weather for Thursday 18th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 21°C, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

21
°C maximum temperature
10
°C minimum temperature
scattered clouds
8
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
21
°C wind chill
11
kph wind from NW

Keystone weather for Friday 19th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 24°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the east.