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
19th Jan
-3

-9

4

0
Tuesday
20th Jan
6

-4

6

2
Wednesday
21st Jan
-2

-10

4

1
Thursday
22nd Jan
-1

-10

5

1

5-day weather forecast updated at 04:07 on Saturday 17th January 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 19th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -3°C and 4 hours of bright sunshine. There are 0-2 cm of snow expected with 2% chance of some snow and a gentle breeze of 17 kph from the north-west.

-3
°C maximum temperature
-9
°C minimum temperature
clear skies with flurries of snow
4
hours of sunshine
0
UV index (None)
2
% chance of some snow
<2
cm of snow expected
-8
°C wind chill
17
kph wind from NW

Keystone weather for Tuesday 20th January 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 6°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 5% chance of some sleet or snow and a moderate breeze of 21 kph from the north-west.

6
°C maximum temperature
-4
°C minimum temperature
cloudy with sleet or snow
6
hours of sunshine
2
UV index (Low)
5
% chance of some sleet or snow
<2
mm of sleet/snow expected
2
°C wind chill
21
kph wind from NW

Keystone weather for Wednesday 21st January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of -2°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 15 kph from the north-west.

-2
°C maximum temperature
-10
°C minimum temperature
scattered clouds
4
hours of sunshine
1
UV index (Low)
0
cm of snow expected
-6
°C wind chill
15
kph wind from NW

Keystone weather for Thursday 22nd January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of -1°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 7 kph from the west.