Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 2°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
6th Mar
2

-3

0

3
Saturday
7th Mar
11

-3

8

4
Sunday
8th Mar
18

5

11

5
Monday
9th Mar
12

1

1

3
Tuesday
10th Mar
6

-2

0

4

5-day weather forecast updated at 04:03 on Friday 6th March 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 6th March 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 2°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0-2 cm of snow expected with 32% chance of some snow and a moderate breeze of 21 kph from the north.

2
°C maximum temperature
-3
°C minimum temperature
mostly cloudy with light snow
0
hours of sunshine
3
UV index (Moderate)
32
% chance of some snow
<2
cm of snow expected
-2
°C wind chill
21
kph wind from N

Keystone weather for Saturday 7th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

11
°C maximum temperature
-3
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
11
°C wind chill
16
kph wind from W

Keystone weather for Sunday 8th March 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the west.

18
°C maximum temperature
5
°C minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
17
kph wind from W

Keystone weather for Monday 9th March 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 24% chance of some rain and a light breeze of 12 kph from the south.

12
°C maximum temperature
1
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
24
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
kph wind from S

Keystone weather for Tuesday 10th March 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 6°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 53% chance of some sleet or snow and a light breeze of 10 kph from the north-west.