Weather World
Marsh Lake, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Marsh Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  | |  |  |  |  | | | |
| Thunderstorms | Chance of T-Storm | Chance of T-Storm | Patchy Fog | Patchy Fog | Mostly Clear | Mostly Sunny | Partly Cloudy | Rain Showers | Partly Cloudy | Sunny | Mostly Clear |
| Hi: 59°FHi: 15°C | Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 30°FLo: -1°C | Hi: 69°FHi: 21°C | Lo: 31°FLo: -1°C | Hi: 69°FHi: 21°C | Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 35°FLo: 2°C | Hi: 71°FHi: 22°C | Lo: 35°FLo: 2°C |
| POP: 60% | POP: 60% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 653 AM MDT Sat Sep 19 2026 
Marsh Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Marsh Lake Weather Map
Marsh Lake Quick Facts
Marsh Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1233 PM MDT Sat Sep 19 2026
Key Messages
- A few strong thunderstorms are expected over southeast Montana through this evening. Main threat is heavy rain and strong winds.
- Flood Watch in effect through Sunday for much of the area. Widespread precipitation through the weekend.
- Widespread 50-95% chance of an inch of rainfall. 50-80% chance of two inches of rainfall for portions of south central Montana.
Discussion
...
Rest of Today through Friday...
Widespread rain will continue over the next 24 hours. An estimated 0.75-1.25" of ra...