Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 79°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Wednesday
22nd Apr
79

55

8

7
Thursday
23rd Apr
54

36

5

5
Friday
24th Apr
43

30

2

6
Saturday
25th Apr
48

28

1

3
Sunday
26th Apr
41

34

0

5

5-day weather forecast updated at 04:02 on Wednesday 22nd April 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 Wednesday 22nd April 2026

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 79°F, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the south-west.

79
°F maximum temperature
55
°F minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
16
mph wind from SW

Keystone weather for Thursday 23rd April 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 54°F, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 33% chance of some snow and a moderate breeze of 15 mph from the north-west.

54
°F maximum temperature
36
°F minimum temperature
mostly cloudy with light snow
5
hours of sunshine
5
UV index (Moderate)
33
% chance of some snow
<2
cm of snow expected
0
no heat & humidity
15
mph wind from NW

Keystone weather for Friday 24th April 2026

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 43°F, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 61% chance of some snow and a light breeze of 6 mph from the north.

43
°F maximum temperature
30
°F minimum temperature
mostly cloudy with light snow
2
hours of sunshine
6
UV index (High)
61
% chance of some snow
<5
cm of snow expected
39
°F wind chill
6
mph wind from N

Keystone weather for Saturday 25th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of sleet/snow expected with 42% chance of some sleet or snow and a light breeze of 6 mph from the south-east.

48
°F maximum temperature
28
°F minimum temperature
cloudy with sleet or snow
1
hour of sunshine
3
UV index (Moderate)
42
% chance of some sleet or snow
<2
mm of sleet/snow expected
46
°F wind chill
6
mph wind from SE

Keystone weather for Sunday 26th April 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 41°F, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 78% chance of some sleet or snow and a gentle breeze of 8 mph from the north.