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.

Tuesday
14th Apr
14

5

2

4
Wednesday
15th Apr
19

5

11

6
Thursday
16th Apr
20

5

3

6
Friday
17th Apr
4

-3

0

2
Saturday
18th Apr
6

-3

8

6

5-day weather forecast updated at 04:03 on Tuesday 14th April 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 Tuesday 14th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the west.

14
°C maximum temperature
5
°C minimum temperature
broken clouds
2
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
7
kph wind from W

Keystone weather for Wednesday 15th April 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 19°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-west.

19
°C maximum temperature
5
°C minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Keystone weather for Thursday 16th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 20°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south-west.

20
°C maximum temperature
5
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
20
°C wind chill
21
kph wind from SW

Keystone weather for Friday 17th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 4°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 64% chance of some sleet or snow and a gentle breeze of 19 kph from the north-west.

4
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
2
UV index (Low)
64
% chance of some sleet or snow
<5
mm of sleet/snow expected
0
°C wind chill
19
kph wind from NW

Keystone weather for Saturday 18th April 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 6°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north-west.