Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 17°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Sunday
11th Oct
17

8

3

4
Monday
12th Oct
17

6

5

3
Tuesday
13th Oct
11

5

0

3
Wednesday
14th Oct
10

5

2

2
Thursday
15th Oct
13

5

10

3

5-day weather forecast updated at 04:02 on Sunday 11th October 2026 GMT

More about Keystone

Keystone by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

GO Airport Shuttle discount code: 5% off airport transfers

Discount Code

Save EXTRA 5% on airport transfers worldwide
Book private taxis & shuttle buses with discount code
Enter in coupon box on 'Reservations' page

Show discount code

******WEB

Redeem GO Airport Shuttle discount code >>

Expires at 23:59 on Thursday 31st Dec 2026

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 Sunday 11th October 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 17°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 east.

17
°C maximum temperature
8
°C minimum temperature
broken clouds
3
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
17
°C wind chill
8
kph wind from E

Keystone weather for Monday 12th October 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a light breeze of 8 kph from the north-east.

17
°C maximum temperature
6
°C minimum temperature
sunshine and showers
5
hours of sunshine
3
UV index (Moderate)
21
% chance of some rain
<2
mm of rainfall expected
17
°C wind chill
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 11°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 38% chance of some rain and a light breeze of 7 kph from the south-east.

11
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
3
UV index (Moderate)
38
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
7
kph wind from SE

Keystone weather for Wednesday 14th October 2026

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 10°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 76% chance of some rain and a light breeze of 8 kph from the east.

10
°C maximum temperature
5
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
2
UV index (Low)
76
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
8
kph wind from E

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 3 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 36% chance of some rain and a moderate breeze of 22 kph from the north-west.