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Harkness Lakes Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
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| Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Clear |
| Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 68°FHi: 20°C | Lo: 45°FLo: 7°C | Hi: 67°FHi: 19°C | Hi: 71°FHi: 22°C Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C Lo: 45°FLo: 7°C | Lo: 45°FLo: 7°C | Hi: 67°FHi: 19°C Lo: 41°FLo: 5°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 PM MDT Wed Sep 30 2026 
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Issued: 1129 PM MDT Wed Sep 30 2026
Key Messages
- Seasonable temperatures today and tomorrow, with a brief warm up through this weekend.
- Generally dry through next week, with light rain showers dissipating this evening.
Discussion
... /Issued 536 PM MDT Wed Sep 30 2026/- Meteorological Overview:
Zonal flow aloft will continue throughout today, before weak ridging begins to build off to the west tomorrow. This will allow temperatures to remain seasonable today and tomorrow, with highs in the mid 60s to low 70s across much of the CWA. Som...