Weather WorldCaptain Meriwether Lewis Historical Marker, MT Weather Forecast
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Captain Meriwether Lewis Historical Marker Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | WEDNESDAY |
 |  |  | |  |  |  | | |  | |
| Smoke | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Sunny | Chance of T-Storm | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 76°FHi: 24°C Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C Lo: 50°FLo: 10°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 812 PM MDT Wed Aug 19 2026 
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Captain Meriwether Lewis Historical Marker Forecast Discussion
Issued: 815 PM MDT Wed Aug 19 2026
Key Messages
- Mostly dry through Thursday, with thunderstorms returning to Southwestern Montana Friday.
- Additional thunderstorms expected Saturday, some of which could be strong and produce heavy rainfall.
- Temperatures will generally be seasonable, though above average temperatures are expected Friday and Saturday.
Discussion
... /Issued 543 PM MDT Wed Aug 19 2026/- Meteorological Overview:
Upper level ridging has continued to build across the Western US today, which has ...