Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 9°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Thursday
15th Oct
9

0

9

4
Friday
16th Oct
10

-2

11

4
Saturday
17th Oct
23

8

11

4
Sunday
18th Oct
17

7

11

4
Monday
19th Oct
18

6

11

4

5-day weather forecast updated at 04:03 on Thursday 15th 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 Thursday 15th October 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 10% chance of some rain and a fresh breeze of 29 kph from the north-west.

9
°C maximum temperature
0
°C minimum temperature
sunshine and showers
9
hours of sunshine
4
UV index (Moderate)
10
% chance of some rain
<2
mm of rainfall expected
5
°C wind chill
29
kph wind from NW

Keystone weather for Friday 16th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 10°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.

10
°C maximum temperature
-2
°C minimum temperature
clear skies
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from SW

Keystone weather for Saturday 17th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

23
°C maximum temperature
8
°C minimum temperature
clear skies
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from W

Keystone weather for Sunday 18th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north.

17
°C maximum temperature
7
°C minimum temperature
clear skies
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
17
°C wind chill
14
kph wind from N

Keystone weather for Monday 19th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south.