Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 12°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Friday
13th Feb
12

0

9

2
Saturday
14th Feb
11

1

10

2
Sunday
15th Feb
14

1

2

2
Monday
16th Feb
13

1

10

2
Tuesday
17th Feb
12

3

4

1

5-day weather forecast updated at 04:03 on Friday 13th February 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 Friday 13th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the west.

12
°C maximum temperature
0
°C minimum temperature
clear skies
9
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
12
°C wind chill
7
kph wind from W

Keystone weather for Saturday 14th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the west.

11
°C maximum temperature
1
°C minimum temperature
clear skies
10
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
7
kph wind from W

Keystone weather for Sunday 15th February 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 14°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the west.

14
°C maximum temperature
1
°C minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
14
°C wind chill
11
kph wind from W

Keystone weather for Monday 16th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

13
°C maximum temperature
1
°C minimum temperature
scattered clouds
10
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
13
°C wind chill
11
kph wind from S

Keystone weather for Tuesday 17th February 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.