World > North America > United States > South Dakota > Keystone   Keystone, SD Weather Town of Keystone, SD

Keystone, SD Weather Forecast

Feedback E-mail the Weather

Quick Weather Clicks

Keystone, SD Weather Forecast

Current Conditions

Settings
Keystone SD weather - Clear - 50°F
Clear
50°F
Updated 11:21 am
Feels Like 46°F
Humidity 34%
Wind VRB 5 mph
Barometer  29.99 in
Dew Point 23°F
Keystone SD weather - Clear - 10°C
Clear
10°C
Updated 11:21 am
Feels Like 8°C
Humidity 34%
Wind VRB 8 km/h
Barometer  101.5 kPa
Dew Point -5°C
WX Settings

Keystone Weather Forecast

TODAY TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Keystone, SD Weather - Today Partly Cloudy Keystone, SD Weather - Tonight Partly Cloudy Keystone, SD Weather - Thursday Partly Cloudy Keystone, SD Weather - Thursday Night Partly Cloudy Keystone, SD Weather - Friday Clearing Keystone, SD Weather - Friday Night Clear Keystone, SD Weather - Saturday Sunny Keystone, SD Weather - Saturday Night Clear Keystone, SD Weather - Sunday Sunny Keystone, SD Weather - Sunday Night Mostly Clear Keystone, SD Weather - Monday Sunny Keystone, SD Weather - Monday Night Partly Cloudy
Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Clearing Clear Sunny Clear Sunny Mostly Clear Sunny Partly Cloudy
Hi: 51°FHi: 11°C
 Lo: 31°FLo: -1°C Hi: 55°FHi: 13°C
 Lo: 35°FLo: 2°C Hi: 51°FHi: 11°C
 Lo: 31°FLo: -1°C Hi: 55°FHi: 13°C
 Lo: 35°FLo: 2°C Hi: 61°FHi: 16°C
 Lo: 41°FLo: 5°C Hi: 59°FHi: 15°C
 Lo: 39°FLo: 4°C
POP = Probability of Precipitation.
Weather Outlook Updated: 757 AM MST Wed Nov 04 2026 Keystone, SD Weather - WeatherWorld.com

Trending Headlines

Keystone Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Keystone Quick Facts

National Two Day Weather Forecast


E-mail the Keystone Weather Forecast

Voice your opinion or tell us about page issues...

Keystone Forecast Discussion

Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 1022 AM MST Wed Nov 4 2026

Key Messages

  • Dry through the weekend with temperatures trending warmer for the weekend into early next week.

Discussion

...(This Evening Through Tuesday) Issued at 1235 PM MST Tue Nov 3 2026

Upper level analysis shows upper trough axis centered from the Upper Midwest through the Southern Plains. Further upstream, water vapor imagery shows closed upper low moving onshore across northern CA and OR/WA. Diffuse surface high pressure over the northern Rockies into Northern Plains with brisk NW surface fl...