Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 14°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
13th Jun
14

7

4

4
Sunday
14th Jun
17

6

7

7
Monday
15th Jun
22

7

9

9
Tuesday
16th Jun
24

11

3

5
Wednesday
17th Jun
23

12

14

8

5-day weather forecast updated at 04:03 on Saturday 13th 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 Saturday 13th June 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 71% chance of some rain and a gentle breeze of 16 kph from the north-west.

14
°C maximum temperature
7
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
4
UV index (Moderate)
71
% chance of some rain
<5
mm of rainfall expected
14
°C wind chill
16
kph wind from NW

Keystone weather for Sunday 14th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 17°C, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.

17
°C maximum temperature
6
°C minimum temperature
scattered clouds
7
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
17
°C wind chill
8
kph wind from N

Keystone weather for Monday 15th June 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 22°C, maximum UV of 9 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

22
°C maximum temperature
7
°C minimum temperature
broken clouds
9
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
22
°C wind chill
16
kph wind from NW

Keystone weather for Tuesday 16th June 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

24
°C maximum temperature
11
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
15
kph wind from W

Keystone weather for Wednesday 17th June 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 23°C, maximum UV of 8 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north-west.