Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 10°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Tuesday
13th Oct
10

3

1

2
Wednesday
14th Oct
12

5

1

3
Thursday
15th Oct
13

3

6

4
Friday
16th Oct
15

0

11

4
Saturday
17th Oct
24

8

11

4

5-day weather forecast updated at 04:02 on Tuesday 13th 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 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 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 22% chance of some rain and little or no wind of 6 kph from the south-east.

10
°C maximum temperature
3
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
22
% 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 12°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and little or no wind of 6 kph from the south-east.

12
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
41
% chance of some rain
<2
mm of rainfall expected
12
°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 13°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 18% chance of some rain and a moderate breeze of 25 kph from the north.

13
°C maximum temperature
3
°C minimum temperature
sunshine and showers
6
hours of sunshine
4
UV index (Moderate)
18
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
25
kph wind from N

Keystone weather for Friday 16th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south-west.

15
°C maximum temperature
0
°C minimum temperature
clear skies
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
15
°C wind chill
20
kph wind from SW

Keystone weather for Saturday 17th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the west.