Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be -7°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Thursday
22nd Jan
-7

-21

6

2
Friday
23rd Jan
-18

-22

1

1
Saturday
24th Jan
-9

-20

6

2
Sunday
25th Jan
-12

-18

5

2
Monday
26th Jan
3

-14

10

2

5-day weather forecast updated at 04:04 on Friday 23rd 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 Thursday 22nd January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -7°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 61% chance of some snow and a light breeze of 8 kph from the north-east.

-7
°C maximum temperature
-21
°C minimum temperature
clear skies with flurries of snow
6
hours of sunshine
2
UV index (Low)
61
% chance of some snow
<2
cm of snow expected
-11
°C wind chill
8
kph wind from NE

Keystone weather for Friday 23rd January 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of -18°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 60% chance of some snow and a light breeze of 9 kph from the south-east.

-18
°C maximum temperature
-22
°C minimum temperature
mostly cloudy with light snow
1
hour of sunshine
1
UV index (Low)
60
% chance of some snow
<2
cm of snow expected
-24
°C wind chill
9
kph wind from SE

Keystone weather for Saturday 24th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -9°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and little or no wind of 5 kph from the west.

-9
°C maximum temperature
-20
°C minimum temperature
clear skies with flurries of snow
6
hours of sunshine
2
UV index (Low)
25
% chance of some snow
<2
cm of snow expected
-11
°C wind chill
5
kph wind from W

Keystone weather for Sunday 25th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -12°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 9% chance of some snow and a light breeze of 10 kph from the north.

-12
°C maximum temperature
-18
°C minimum temperature
clear skies with flurries of snow
5
hours of sunshine
2
UV index (Low)
9
% chance of some snow
<2
cm of snow expected
-18
°C wind chill
10
kph wind from N

Keystone weather for Monday 26th January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 3°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.