Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 4°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
25th Apr
4

-3

3

3
Sunday
26th Apr
2

-1

0

2
Monday
27th Apr
5

0

0

5
Tuesday
28th Apr
6

0

1

2
Wednesday
29th Apr
11

0

1

7

5-day weather forecast updated at 04:02 on Saturday 25th April 2026 GMT

More about Keystone

Keystone by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

GO Airport Shuttle discount code: 5% off airport transfers

Discount Code

Save EXTRA 5% on airport transfers worldwide
Book private taxis & shuttle buses with discount code
Enter in coupon box on 'Reservations' page

Show discount code

******WEB

Redeem GO Airport Shuttle discount code >>

Expires at 23:59 on Thursday 31st Dec 2026

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 25th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 24% chance of some sleet or snow and a light breeze of 8 kph from the south-east.

4
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
3
hours of sunshine
3
UV index (Moderate)
24
% chance of some sleet or snow
<2
mm of sleet/snow expected
2
°C wind chill
8
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 2°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 98% chance of some sleet or snow and a light breeze of 11 kph from the north.

2
°C maximum temperature
-1
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
2
UV index (Low)
98
% chance of some sleet or snow
<10
mm of sleet/snow expected
-1
°C wind chill
11
kph wind from N

Keystone weather for Monday 27th April 2026

Expect mostly cloudy with light 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 2-5 cm of snow expected with 34% chance of some snow and a gentle breeze of 18 kph from the north.

5
°C maximum temperature
0
°C minimum temperature
mostly cloudy with light snow
0
hours of sunshine
5
UV index (Moderate)
34
% chance of some snow
<5
cm of snow expected
2
°C wind chill
18
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 6°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 61% chance of some sleet or snow and a light breeze of 7 kph from the south-east.

6
°C maximum temperature
0
°C minimum temperature
cloudy with sleet or snow
1
hour of sunshine
2
UV index (Low)
61
% chance of some sleet or snow
<5
mm of sleet/snow expected
4
°C wind chill
7
kph wind from SE

Keystone weather for Wednesday 29th April 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 7 (High) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 37% chance of some rain and a light breeze of 9 kph from the north-west.