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Phyllis Lake Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | |  |  | | |  | | |
| Chance of T-Storm | Partly Cloudy | Chance of Rain | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Rain | Chance of Rain | Chance of T-Storm |
| Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 75°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 85°FHi: 29°C | Lo: 50°FLo: 10°C | Hi: 85°FHi: 29°C | Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C |
| POP: 30% | POP: 30% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1223 PM MDT Sun Aug 16 2026 
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Phyllis Lake Forecast Discussion
Issued: 1257 PM MDT Sun Aug 16 2026
Discussion
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KEY MESSAGES:
- Shower and thunderstorm activity will continue each afternoon through Tuesday.
- Warming and drying latter part of next week under a ridge of high pressure.
Visible on satellite imagery this afternoon is a circulation of low pressure off the coast of California, along with a smaller, weaker circulation near the Olympic Peninsula. These low pressure systems to the west are keeping the Northern Rockies in southwest flow, resulting in the transp...