Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 23°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Thursday
22nd Oct
23

13

9

4
Friday
23rd Oct
24

13

4

4
Saturday
24th Oct
12

2

6

3
Sunday
25th Oct
5

1

0

1
Monday
26th Oct
5

0

0

1

5-day weather forecast updated at 04:07 on Thursday 22nd October 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 Thursday 22nd October 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-west.

23
°C maximum temperature
13
°C minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
11
kph wind from SW

Keystone weather for Friday 23rd October 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the west.

24
°C maximum temperature
13
°C minimum temperature
broken clouds
4
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
24
°C wind chill
25
kph wind from W

Keystone weather for Saturday 24th October 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-west.

12
°C maximum temperature
2
°C minimum temperature
broken clouds
6
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
13
kph wind from NW

Keystone weather for Sunday 25th October 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 5°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 66% chance of some sleet or snow and a light breeze of 7 kph from the east.

5
°C maximum temperature
1
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
1
UV index (Low)
66
% chance of some sleet or snow
<5
mm of sleet/snow expected
3
°C wind chill
7
kph wind from E

Keystone weather for Monday 26th October 2026

Expect overcast skies in Keystone, South Dakota with a maximum temperature of 5°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the east.