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Duncan Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | |  |  | |  | | |  |  |  |
| Patchy Fog | Mostly Clear | Patchy Fog | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Rain | Chance of Rain |
| Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C | Hi: 56°FHi: 13°C | Lo: 30°FLo: -1°C | Hi: 60°FHi: 16°C | Lo: 30°FLo: -1°C | Hi: 55°FHi: 13°C | Lo: 35°FLo: 2°C | Hi: 56°FHi: 13°C | Lo: 36°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C |
| POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM MDT Thu Oct 15 2026 
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Issued: 258 AM MDT Thu Oct 15 2026
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KEY MESSAGES:- Cool mornings and pleasant afternoons the rest of the week.
- Gusty winds and choppy lakes on Saturday, especially across northwest MT.
- Pattern shift early next week, gradually cooling and a chance of showers.
High pressure will bring mostly sunny skies and pleasant mid-October weather across the region through Friday, aside from some patchy morning valley fog. High temperatures on Friday may be slightly cooler in the valleys than some forecast models suggest due to stabl...