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Thunderbolt Lake Weather Forecast
| REST OF TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  | | | | | | | | | |
| Clearing | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Clear | Clear | Mostly Clear | Mostly Clear | Mostly Sunny | Mostly Clear |
| Hi: 37°FHi: 3°C | Lo: 19°FLo: -7°C | Hi: 43°FHi: 6°C | Lo: 28°FLo: -2°C | Hi: 51°FHi: 11°C | Lo: 30°FLo: -1°C | Hi: 57°FHi: 14°C Lo: 34°FLo: 1°C | Hi: 57°FHi: 14°C Lo: 34°FLo: 1°C | Hi: 57°FHi: 14°C Lo: 35°FLo: 2°C | Hi: 57°FHi: 14°C Lo: 35°FLo: 2°C | Hi: 57°FHi: 14°C | Hi: 58°FHi: 14°C Lo: 37°FLo: 3°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 701 AM MDT Tue Oct 13 2026 
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Instant definitions for any meteorological term.
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Issued: 520 AM MDT Tue Oct 13 2026
Key Messages
-Dense fog is possible this morning across the plains of North- Central Montana and the valleys of Southwestern Montana.
-Today it will remain significantly below seasonal averages with dry weather.
-Wednesday through Friday it will gradually warm up with mostly dry weather.
Discussion
... /Issued 154 AM MDT Tue Oct 13 2026/- Meteorological Overview:
Today there is a weak upper-level ridge over North-central, Central, and Southwestern Montana. This will allow skies to clear. As a result of...