Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 3°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Monday
27th Apr
3

-2

1

4
Tuesday
28th Apr
4

-1

2

2
Wednesday
29th Apr
10

0

6

6
Thursday
30th Apr
9

-1

3

5
Friday
1st May
13

0

5

7

5-day weather forecast updated at 04:03 on Tuesday 28th 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 Monday 27th April 2026

Expect mostly cloudy with snow in Keystone, South Dakota with a maximum temperature of 3°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 5-10 cm of snow expected with 40% chance of some snow and a gentle breeze of 13 kph from the north.

3
°C maximum temperature
-2
°C minimum temperature
mostly cloudy with snow
1
hour of sunshine
4
UV index (Moderate)
40
% chance of some snow
<10
cm of snow expected
0
°C wind chill
13
kph wind from N

Keystone weather for Tuesday 28th 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 2 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 99% chance of some sleet or snow and a light breeze of 7 kph from the south-east.

4
°C maximum temperature
-1
°C minimum temperature
cloudy with sleet or snow
2
hours of sunshine
2
UV index (Low)
99
% chance of some sleet or snow
<10
mm of sleet/snow expected
3
°C wind chill
7
kph wind from SE

Keystone weather for Wednesday 29th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 10°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

10
°C maximum temperature
0
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
8
°C wind chill
11
kph wind from NW

Keystone weather for Thursday 30th April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.

9
°C maximum temperature
-1
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
7
°C wind chill
12
kph wind from N

Keystone weather for Friday 1st May 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the east.