Weather WorldRuby Reservoir, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Ruby Reservoir Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  |  |  |  |  |  | | |  | |
| Mostly Cloudy | Clearing | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Clear | Mostly Clear |
| Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 331 PM MDT Tue Sep 15 2026 
Ruby Reservoir Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Ruby Reservoir Weather Map
Ruby Reservoir Quick Facts
Ruby Reservoir Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 401 PM MDT Tue Sep 15 2026
Key Messages
- Dry conditions will continue throughout the day. Winds remain light and variable but are expected to increase in the afternoon.
- Chances of widespread showers return later in the week, moving in Thursday night and exiting over the weekend. 0.50" to 1.00" amounts are possible in the eastern zones.
Discussion
...
SYNOPTIC SETUP:
A ridge is building over the Northern Rockies and will gradually shift east into the CWA, bringing warmer and drier conditions across Northeast Montana. Temperature...