Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 36°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

Tuesday
10th Mar
36

23

0

1
Wednesday
11th Mar
39

23

11

4
Thursday
12th Mar
57

30

6

4
Friday
13th Mar
48

34

1

3
Saturday
14th Mar
48

25

4

2

5-day weather forecast updated at 04:03 on Tuesday 10th March 2026 GMT

More about Keystone

Keystone by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

Travelbag: up to 50% off 2026 holidays

Sale

Save up to 50% on 2026 holidays & tours with Travelbag
Book selected stays in popular destinations around the world
Travel before 31st December 2026 (inclusive)

Go to Travelbag deal >>

Expires at 23:59 on Tuesday 31st Mar 2026 · View all Travelbag offers

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 Tuesday 10th March 2026

Expect mostly cloudy with snow in Keystone, South Dakota with a maximum temperature of 36°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 cm of snow expected with 97% chance of some snow and a light breeze of 7 mph from the south-east.

36
°F maximum temperature
23
°F minimum temperature
mostly cloudy with snow
0
hours of sunshine
1
UV index (Low)
97
% chance of some snow
<10
cm of snow expected
30
°F wind chill
7
mph wind from SE

Keystone weather for Wednesday 11th March 2026

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the west.

39
°F maximum temperature
23
°F minimum temperature
scattered clouds
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
32
°F wind chill
11
mph wind from W

Keystone weather for Thursday 12th March 2026

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 57°F, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 64% chance of some rain and a fresh breeze of 18 mph from the west.

57
°F maximum temperature
30
°F minimum temperature
sunshine and showers
6
hours of sunshine
4
UV index (Moderate)
64
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
18
mph wind from W

Keystone weather for Friday 13th March 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 2-5 mm of sleet/snow expected with 22% chance of some sleet or snow and a light breeze of 6 mph from the north-west.

48
°F maximum temperature
34
°F minimum temperature
cloudy with sleet or snow
1
hour of sunshine
3
UV index (Moderate)
22
% chance of some sleet or snow
<5
mm of sleet/snow expected
46
°F wind chill
6
mph wind from NW

Keystone weather for Saturday 14th March 2026

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 48°F, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 68% chance of some sleet or snow and a gentle breeze of 11 mph from the north.