Weather WorldUpper Fishtrap Lake, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Upper Fishtrap Lake Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | |  |  | | | |  |  |
| Partly Cloudy | Partly Cloudy | Patchy Fog | Mostly Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Clearing | Mostly Sunny | Mostly Clear | Chance of Rain |
| Lo: 36°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 30°FLo: -1°C | Hi: 56°FHi: 13°C | Lo: 35°FLo: 2°C | Hi: 60°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 60°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 60°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 56°FHi: 13°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1223 PM MDT Fri Oct 16 2026 
Upper Fishtrap Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Upper Fishtrap Lake Weather Map
Upper Fishtrap Lake Quick Facts
Upper Fishtrap Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1128 AM MDT Fri Oct 16 2026
Discussion
...
KEY MESSAGES:- Gusty winds on Saturday creating choppy conditions for area lakes, especially across northwest Montana.
- Cooler and showery by early to mid next week.
High pressure conditions continue through tomorrow creating stable conditions. What does that produce in terms of weather, valley inversions, light winds, limited afternoon warming, and cold mornings with patchy freezing fog and low stratus.
By Saturday afternoon, our valley inversions break and temperatures warm into the l...