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Harvey Lake Weather Forecast
| REST OF TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  |  | | | | |  | | |
| Partly Cloudy | Mostly Sunny | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Rain Showers | Chance of T-Storm | Sunny |
| Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C Lo: 51°FLo: 11°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 902 PM MDT Thu Aug 20 2026 
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Harvey Lake Forecast Discussion
Issued: 858 PM MDT Thu Aug 20 2026
Key Messages
- It will be hot and dry through Friday, with the warmer temperatures extending through Sunday.
- There is a chance for thunderstorms in Southwest MT Friday, with chances for showers and thunderstorms in Southwest and Central MT Saturday and Sunday.
- A cold front will bring gusty winds across the CWA Sunday, and will give slightly cooler temperatures for Monday and Tuesday.
Discussion
... /Issued 549 PM MDT Thu Aug 20 2026/- Meteorological Overview:
Montana conti...