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Gallatin Field Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  | | | |  |  |  |  | | | |
| Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Sunny | Chance of Rain | Rain | Rain and Snow | Partly Cloudy | Partly Cloudy | Rain and Snow | Mostly Sunny |
| Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 49°FHi: 9°C | Lo: 29°FLo: -2°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C | Hi: 49°FHi: 9°C Lo: 25°FLo: -4°C | Lo: 29°FLo: -2°C | Hi: 50°FHi: 10°C |
| POP: 70% | POP: 100% | POP: 70% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 AM MDT Tue Oct 20 2026 
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Issued: 502 AM MDT Tue Oct 20 2026
Key Messages
- Temperatures will be a roller coaster over the next several days with a mid-week warmup followed by another drop to near or slightly below seasonal averages for the weekend.
- Rain and Mountain snow will overspread the region Friday into Saturday bringing healthy liquid precipitation to lower elevations and accumulating snowfall above 4kft.
- Gusty winds develop across the area Friday afternoon into early Saturday morning. Highest gusts will be across Central MT and the Hi-Line.