- Save up to £400 per couple on worldwide tours in 2026
- Book tours to Europe, Asia, Africa, Americas & beyond
- Travel between 1st Jan & 31st Dec 2026 (inclusive)
Keystone weather live forecast
Today's maximum temperature in Keystone is expected to be 32°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.
-
Sunday
27th Jul -
Monday
28th Jul -
Tuesday
29th Jul -
Wednesday
30th Jul -
Thursday
31st Jul
5-day weather forecast updated at 04:03 on Sunday 27th July 2025 GMT
More about Keystone
Keystone by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for South Dakota
Expires at 23:59 on Wednesday 3rd Sep 2025 · View all Cosmos 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 Sunday 27th July 2025
Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the west.
- °C maximum temperature
- °C minimum temperature
- scattered clouds
- hours of sunshine
- UV index (Very High)
- mm of rainfall expected
- moderate heat & humidity
- kph wind from W
Keystone weather for Monday 28th July 2025
Expect broken clouds in Keystone, South Dakota with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.
- °C maximum temperature
- °C minimum temperature
- broken clouds
- hours of sunshine
- UV index (Very High)
- mm of rainfall expected
- moderate heat & humidity
- kph wind from N
Keystone weather for Tuesday 29th July 2025
Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 75% chance of some rain and a light breeze of 11 kph from the east.
- °C maximum temperature
- °C minimum temperature
- isolated thunderstorms
- hours of sunshine
- UV index (Moderate)
- % chance of some rain
- mm of rainfall expected
- no heat & humidity
- kph wind from E
Keystone weather for Wednesday 30th July 2025
Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 74% chance of some rain and a light breeze of 11 kph from the east.
- °C maximum temperature
- °C minimum temperature
- isolated thunderstorms
- hours of sunshine
- UV index (Moderate)
- % chance of some rain
- mm of rainfall expected
- °C wind chill
- kph wind from E
Keystone weather for Thursday 31st July 2025
Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 19°C, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 59% chance of some rain and a gentle breeze of 15 kph from the south-east.
- °C maximum temperature
- °C minimum temperature
- mostly cloudy with light rain
- hours of sunshine
- UV index (High)
- % chance of some rain
- mm of rainfall expected
- no heat & humidity
- kph wind from SE
- Save on return flights to worldwide destinations
- Book flights to Abu Dhabi, Jo'burg, Tokyo & more
- Plus more flights to the Americas, Middle East & Europe
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- January sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport