Weather WorldFish Lake, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Fish Lake Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | | | | | | | | |
| Mostly Cloudy | Mostly Cloudy | Rain and Snow | Snow | Rain and Snow | Rain and Snow | Snow | Rain and Snow | Chance of Snow | Chance of Snow | Chance of Snow | Mostly Cloudy |
| Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 26°FLo: -3°C | Hi: 45°FHi: 7°C | Lo: 25°FLo: -4°C | Hi: 45°FHi: 7°C | Lo: 22°FLo: -6°C | Hi: 46°FHi: 8°C |
| POP: 50% | POP: 90% | POP: 90% | POP: 90% | POP: 80% | POP: 60% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1228 PM MDT Sun Oct 25 2026 
Fish Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Fish Lake Weather Map
Fish Lake Quick Facts
Fish Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1247 PM MDT Sun Oct 25 2026
Discussion
...
KEY MESSAGES:- High pressure breaks down early Monday.
- Colder temperatures and periods of rain and mountain snow expected this week.
A weak ridge of high pressure over the Northern Rockies will maintain dry conditions and seasonal temperatures through this afternoon. Patchy fog is possible Monday morning, but it is not expected to be as dense or widespread as Sunday morning`s fog.
A low pressure system will move into the Pacific Northwest on Monday. Rain and mountain snow from this sys...