Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 13°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Monday
23rd Feb
13

-5

6

3
Tuesday
24th Feb
7

-1

2

2
Wednesday
25th Feb
8

-1

1

2
Thursday
26th Feb
9

-1

11

3
Friday
27th Feb
12

-2

9

3

5-day weather forecast updated at 04:05 on Monday 23rd February 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 23rd February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

13
°C maximum temperature
-5
°C minimum temperature
scattered clouds
6
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
13
°C wind chill
15
kph wind from W

Keystone weather for Tuesday 24th February 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 7°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

7
°C maximum temperature
-1
°C minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
4
°C wind chill
16
kph wind from NW

Keystone weather for Wednesday 25th February 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 8°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 18 kph from the north-west.

8
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
55
% chance of some rain
<2
mm of rainfall expected
5
°C wind chill
18
kph wind from NW

Keystone weather for Thursday 26th February 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the west.

9
°C maximum temperature
-1
°C minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
7
°C wind chill
17
kph wind from W

Keystone weather for Friday 27th February 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.