Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 59°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Sunday
1st Nov
59

45

1

2
Monday
2nd Nov
48

37

0

1
Tuesday
3rd Nov
48

34

10

3
Wednesday
4th Nov
52

34

6

2
Thursday
5th Nov
54

34

8

2

5-day weather forecast updated at 04:03 on Monday 2nd November 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 Sunday 1st November 2026

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 59°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 77% chance of some rain and a gentle breeze of 9 mph from the south.

59
°F maximum temperature
45
°F minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
77
% chance of some rain
<5
mm of rainfall expected
59
°F wind chill
9
mph wind from S

Keystone weather for Monday 2nd November 2026

Expect mostly cloudy with rain in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 80% chance of some rain and a fresh breeze of 21 mph from the north-west.

48
°F maximum temperature
37
°F minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
80
% chance of some rain
<10
mm of rainfall expected
41
°F wind chill
21
mph wind from NW

Keystone weather for Tuesday 3rd November 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the north-west.

48
°F maximum temperature
34
°F minimum temperature
clear skies
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
43
°F wind chill
16
mph wind from NW

Keystone weather for Wednesday 4th November 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 52°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the north-west.

52
°F maximum temperature
34
°F minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
52
°F wind chill
5
mph wind from NW

Keystone weather for Thursday 5th November 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the west.