Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 0°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Monday
16th Mar
0

-12

4

4
Tuesday
17th Mar
14

1

4

5
Wednesday
18th Mar
20

7

6

3
Thursday
19th Mar
22

8

9

6
Friday
20th Mar
24

11

12

5

5-day weather forecast updated at 04:03 on Monday 16th 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 Monday 16th March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 0°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 cm of snow expected and little or no wind of 6 kph from the west.

0
°C maximum temperature
-12
°C minimum temperature
broken clouds
4
hours of sunshine
4
UV index (Moderate)
0
cm of snow expected
-2
°C wind chill
6
kph wind from W

Keystone weather for Tuesday 17th March 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

14
°C maximum temperature
1
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
22
kph wind from NW

Keystone weather for Wednesday 18th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

20
°C maximum temperature
7
°C minimum temperature
scattered clouds
6
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from NW

Keystone weather for Thursday 19th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 22°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.

22
°C maximum temperature
8
°C minimum temperature
scattered clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
13
kph wind from W

Keystone weather for Friday 20th March 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-west.