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Fort Harrison Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
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| Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Showers Likely | Chance of T-Storm | Chance of Showers | Rain Showers | Chance of Showers | Showers Likely | Chance of Showers | Mostly Clear |
| Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C | Lo: 40°FLo: 4°C | Hi: 51°FHi: 11°C | Lo: 39°FLo: 4°C | Hi: 50°FHi: 10°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C Lo: 39°FLo: 4°C |
| POP: 70% | POP: 70% | POP: 50% | POP: 50% | POP: 70% | POP: 60% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 PM MDT Tue Sep 08 2026 
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Issued: 1132 PM MDT Tue Sep 8 2026
Key Messages
- Rain will gradually end along the Hi-Line this evening.
- It will be dry and breezy on Wednesday and Thursday.
- Precipitation and cooler temperatures return Friday through this weekend.
Discussion
... /Issued 606 PM MDT Tue Sep 8 2026/- Meteorological Overview:
An upper-level trough is moving over North-central, Central, and Southwestern Montana this afternoon. As a result rain showers will linger across the Hi-Line through this evening with cooler temperatures across the area. On Wednesday...