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Thunder Lake Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  |  |  |  |  | | | | | |
| Partly Cloudy | Sunny | Mostly Clear | Clouds | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Sunny | Mostly Clear | Sunny |
| Lo: 39°FLo: 4°C | Hi: 55°FHi: 13°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 51°FHi: 11°C | Lo: 41°FLo: 5°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 59°FHi: 15°C |
| POP: 20% | POP: 70% | POP: 70% | POP: 60% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 547 PM MDT Tue Sep 15 2026 
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Issued: 548 PM MDT Tue Sep 15 2026
Key Messages
- Quiet Weather Wednesday.
- Increasing precipitation chances Thursday into the weekend. Locally heavy rainfall possible Friday into Saturday.
- Strong thunderstorms possible Friday east of Billings.
Discussion
... Rest of Today through next Monday...
Quiet weather pattern through Wednesday. Pattern becomes more active Thursday into the weekend.
Zonal flow aloft over the area this afternoon is bringing sunny skies and dry conditions to the region. Winds are slowly starting to turn around to th...