Weather World
Town of Keystone, SDKeystone, SD 7-Day Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Keystone Weather Forecast
Keystone, SD Weather Forecast Date: 1233 PM MDT Sun Sep 06 2026
Weather forecast for Keystone, SD
Today Hi: 89°FHi: 32°C Lo: 61°F Lo: 16°C |
This Afternoon... Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. South winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 20%. |
| Labor Day Hi: 81°FHi: 27°C Lo: 51°F Lo: 11°C |
Labor Day... Partly cloudy. A slight chance of showers and thunderstorms in the morning. Highs in the lower 80s. West winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20%. |
Tue Hi: 79°FHi: 26°C Lo: 49°F Lo: 9°C |
Tuesday... Sunny. Highs in the upper 70s. West winds 5 to 10 mph with gusts up to 25 mph. |
| Wed Hi: 71°FHi: 22°C Lo: 50°F Lo: 10°C |
Wednesday... Sunny. Highs in the lower 70s. |
| Thu Hi: 81°FHi: 27°C Lo: 55°F Lo: 13°C |
Thursday... Sunny. Highs in the lower 80s. |
| Fri Hi: 79°FHi: 26°C Lo: 50°F Lo: 10°C |
Friday... Sunny. Highs in the upper 70s. |
Sat Hi: 69°FHi: 21°C |
Saturday... Partly cloudy. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 30%. |
Keystone Radar Loop
Use the map search tool if you want to place a location marker on the radar map...