Weather WorldCasey Lake, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Casey Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  | |  | | | | |  |  |
| Mostly Sunny | Mostly Cloudy | Clouds | Rain/Snow Showers | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Rain Showers | Chance of Showers |
| Hi: 69°FHi: 21°C | Lo: 35°FLo: 2°C | Hi: 70°FHi: 21°C | Lo: 29°FLo: -2°C | Hi: 59°FHi: 15°C | Lo: 25°FLo: -4°C | Hi: 65°FHi: 18°C | Lo: 29°FLo: -2°C | Hi: 65°FHi: 18°C | Lo: 29°FLo: -2°C | Hi: 69°FHi: 21°C | Lo: 31°FLo: -1°C |
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 350 AM MDT Sat Sep 12 2026 
Casey Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Casey Lake Weather Map
Casey Lake Quick Facts
Casey Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 104 AM MDT Sat Sep 12 2026
Key Messages
- Below average temperatures through the middle of next week.
- Occasional chances of showers (mainly light) through Monday. Scattered thunderstorms possible in southeast Montana Sunday evening, some possibly strong.
- Periods of overnight and morning low clouds and fog in the foothills through Sunday.
- Breezy west winds Monday; gusts over 50 mph possible near Big Timber and Harlowton.
Discussion
...
Next 7 Days...
The forecast for Saturday remains roughly the same. High temperatures today will...