Weather WorldSouth Boundary Ski Trail, MT Weather Forecast
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South Boundary Ski Trail Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 51°FLo: 11°C | Hi: 73°FHi: 23°C | Lo: 51°FLo: 11°C | Hi: 76°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Lo: 59°FLo: 15°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 74°FHi: 23°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 50% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 337 PM MDT Mon Aug 17 2026 
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Issued: 1127 PM MDT Mon Aug 17 2026
Key Messages
- Scattered shower and thunderstorm activity continues through Tuesday with a few storms producing localized strong, gusty winds, brief heavy downpours, and hail in addition to cloud to ground lightning.
- Warmer, drier, and seasonably breezy conditions move in for the second half of the workweek.
- An approaching Pacific trough will bring increased shower and thunderstorm activity, breezy to windy conditions, and elevated fire weather concerns this weekend.