Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 11°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
14th Feb
11

0

9

2
Sunday
15th Feb
14

2

5

3
Monday
16th Feb
13

2

6

2
Tuesday
17th Feb
11

3

0

2
Wednesday
18th Feb
7

-4

5

2

5-day weather forecast updated at 04:05 on Saturday 14th February 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 Saturday 14th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the west.

11
°C maximum temperature
0
°C minimum temperature
clear skies
9
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from W

Keystone weather for Sunday 15th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

14
°C maximum temperature
2
°C minimum temperature
scattered clouds
5
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
12
kph wind from W

Keystone weather for Monday 16th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

13
°C maximum temperature
2
°C minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SW

Keystone weather for Tuesday 17th February 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 31% chance of some rain and a moderate breeze of 23 kph from the west.

11
°C maximum temperature
3
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
2
UV index (Low)
31
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
23
kph wind from W

Keystone weather for Wednesday 18th February 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 5 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 13 kph from the west.