Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 72°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Saturday
3rd Oct
72

48

11

5
Sunday
4th Oct
70

46

11

5
Monday
5th Oct
82

54

11

5
Tuesday
6th Oct
79

57

11

5
Wednesday
7th Oct
73

54

9

5

5-day weather forecast updated at 04:02 on Saturday 3rd 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 Saturday 3rd October 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 72°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north.

72
°F maximum temperature
48
°F minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
72
°F wind chill
11
mph wind from N

Keystone weather for Sunday 4th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 70°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the south-east.

70
°F maximum temperature
46
°F minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
70
°F wind chill
8
mph wind from SE

Keystone weather for Monday 5th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the west.

82
°F maximum temperature
54
°F minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
6
mph wind from W

Keystone weather for Tuesday 6th October 2026

Expect clear skies in Keystone, South Dakota with a maximum temperature of 79°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the west.

79
°F maximum temperature
57
°F minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
6
mph wind from W

Keystone weather for Wednesday 7th October 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 73°F, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the west.