Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be -18°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
23rd Jan
-18

-25

7

1
Saturday
24th Jan
-7

-22

6

2
Sunday
25th Jan
-14

-19

5

2
Monday
26th Jan
3

-16

9

2
Tuesday
27th Jan
3

-5

8

2

5-day weather forecast updated at 04:04 on Saturday 24th 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 Friday 23rd January 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of -18°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 9 kph from the south-east.

-18
°C maximum temperature
-25
°C minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
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 -7°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 14% chance of some snow and a light breeze of 7 kph from the north-west.

-7
°C maximum temperature
-22
°C minimum temperature
clear skies with flurries of snow
6
hours of sunshine
2
UV index (Low)
14
% chance of some snow
<2
cm of snow expected
-10
°C wind chill
7
kph wind from NW

Keystone weather for Sunday 25th January 2026

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of -14°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 11% chance of some snow and a light breeze of 9 kph from the north.

-14
°C maximum temperature
-19
°C minimum temperature
clear skies with flurries of snow
5
hours of sunshine
2
UV index (Low)
11
% chance of some snow
<2
cm of snow expected
-20
°C wind chill
9
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 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the west.

3
°C maximum temperature
-16
°C minimum temperature
scattered clouds
9
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
-1
°C wind chill
18
kph wind from W

Keystone weather for Tuesday 27th January 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 3°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.