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Town of Keystone, COKeystone, CO Weather Forecast
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Keystone Weather Forecast
| TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  | |  |  | | |  | | | |
| Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Chance of T-Storm | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 48°FLo: 9°C | Hi: 67°FHi: 19°C | Lo: 45°FLo: 7°C | Hi: 67°FHi: 19°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 44°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 44°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 44°FLo: 7°C | Lo: 45°FLo: 7°C | Hi: 66°FHi: 19°C | Lo: 42°FLo: 6°C | Hi: 62°FHi: 17°C |
| POP: 20% | POP: 20% | POP: 10% | POP: 40% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 605 PM MDT Sun Sep 06 2026 
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Issued: 525 PM MDT Sun Sep 6 2026
Key Messages
- Isolated thunderstorms late this afternoon and evening.
- An increase in afternoon shower and thunderstorm coverage is favored Monday for most areas.
- Temperatures will remain very warm, with only slight cool down or Tuesday and Wednesday.
- Some potential for a brief cooldown next weekend?
Discussion
/Through Sunday/... Issued at 213 PM MDT Sun Sep 6 2026
Colorado remains sandwiched between an upper level high over the south central part of the county and a large trough off to the northwest...