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Vandalia Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Partly Sunny | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Sunny | Showers | Chance of Showers | Windy | Windy | Chance of Showers | Partly Cloudy | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 60°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Hi: 61°FHi: 16°C Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C Lo: 41°FLo: 5°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 116 PM MDT Fri Sep 11 2026 
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Issued: 216 PM MDT Fri Sep 11 2026
Key Messages
- Possible rain across the northeast portion of Montana beginning Sunday afternoon and lasting overnight.
- Sustained winds of 20 mph with potential gusts to 40 mph will likely result in conditions reaching Lake Wind Advisory criteria Sunday afternoon and Monday.
- Chances for showers overnight Tuesday and into Wednesday.
Discussion
... An approaching upper-level low will continue transporting moisture into region, producing cloudy skies Saturday and possible rain across the northeast portio...