Weather WorldLake Sylvan, MT Weather Forecast
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Lake Sylvan Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  | | |  |  |  | | | | |
| Mostly Clear | Rain Showers | Rain/Snow Showers | Rain Showers | Mostly Clear | Mostly Sunny | Chance of Showers | Snow Showers | Snow Showers | Snow Showers | Snow Showers | Mostly Sunny |
| Lo: 31°FLo: -1°C | Hi: 61°FHi: 16°C | Lo: 31°FLo: -1°C | Hi: 65°FHi: 18°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 25°FLo: -4°C | Hi: 45°FHi: 7°C | Lo: 25°FLo: -4°C | Hi: 55°FHi: 13°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 40% | POP: 100% | POP: 90% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 350 PM MDT Mon Oct 19 2026 
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Issued: 241 PM MDT Mon Oct 19 2026
Key Messages
- Seasonably warm and mainly dry into Thursday, with occasional breezy conditions over eastern Montana and light showers in the Absaroka-Beartooth mountains.
- A weather system will likely bring cooler temperatures, windy conditions, and precipitation to portions of the area Friday into Saturday, though confidence remains low on exact impacts.
Discussion
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Today through Sunday...
Seasonably warm conditions under mostly sunny to sunny skies exist today as a ridge of high pressure over the c...