Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 26°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Wednesday
22nd Apr
26

13

8

7
Thursday
23rd Apr
12

2

5

5
Friday
24th Apr
6

-1

2

6
Saturday
25th Apr
9

-2

1

3
Sunday
26th Apr
5

1

0

5

5-day weather forecast updated at 04:02 on Wednesday 22nd 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 Wednesday 22nd April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 26°C, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the south-west.

26
°C maximum temperature
13
°C minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
25
kph wind from SW

Keystone weather for Thursday 23rd April 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 33% chance of some snow and a moderate breeze of 24 kph from the north-west.

12
°C maximum temperature
2
°C minimum temperature
mostly cloudy with light snow
5
hours of sunshine
5
UV index (Moderate)
33
% chance of some snow
<2
cm of snow expected
0
no heat & humidity
24
kph wind from NW

Keystone weather for Friday 24th April 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 6°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 61% chance of some snow and a light breeze of 9 kph from the north.

6
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
6
UV index (High)
61
% chance of some snow
<5
cm of snow expected
4
°C wind chill
9
kph wind from N

Keystone weather for Saturday 25th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of sleet/snow expected with 42% chance of some sleet or snow and a light breeze of 9 kph from the south-east.

9
°C maximum temperature
-2
°C minimum temperature
cloudy with sleet or snow
1
hour of sunshine
3
UV index (Moderate)
42
% chance of some sleet or snow
<2
mm of sleet/snow expected
8
°C wind chill
9
kph wind from SE

Keystone weather for Sunday 26th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 5°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 78% chance of some sleet or snow and a gentle breeze of 13 kph from the north.