Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 16°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Monday
12th Oct
16

5

3

4
Tuesday
13th Oct
10

4

0

2
Wednesday
14th Oct
11

5

2

3
Thursday
15th Oct
12

3

9

3
Friday
16th Oct
14

0

11

4

5-day weather forecast updated at 04:02 on Monday 12th October 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 12th October 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-east.

16
°C maximum temperature
5
°C minimum temperature
broken clouds
3
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
8
kph wind from NE

Keystone weather for Tuesday 13th October 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 10°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 34% chance of some rain and little or no wind of 6 kph from the south-east.

10
°C maximum temperature
4
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
2
UV index (Low)
34
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Keystone weather for Wednesday 14th October 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 71% chance of some rain and little or no wind of 6 kph from the south-east.

11
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
3
UV index (Moderate)
71
% chance of some rain
<5
mm of rainfall expected
11
°C wind chill
6
kph wind from SE

Keystone weather for Thursday 15th October 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 35% chance of some rain and a moderate breeze of 24 kph from the north.

12
°C maximum temperature
3
°C minimum temperature
sunshine and showers
9
hours of sunshine
3
UV index (Moderate)
35
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
24
kph wind from N

Keystone weather for Friday 16th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.