Harrison, ID Weather Forecast
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Harrison Weather Forecast
| TODAY | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY |
| Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 73°FHi: 23°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 46°FLo: 8°C | Hi: 73°FHi: 23°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 73°FHi: 23°C | Hi: 73°FHi: 23°C Lo: 46°FLo: 8°C | Hi: 73°FHi: 23°C Lo: 46°FLo: 8°C |
| POP: 20% | POP: 80% | POP: 50% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 207 AM PDT Sun Sep 06 2026 

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Issued: 414 AM PDT Sun Sep 6 2026
Key Messages
- Cool and showery weather expected Sunday through Monday with isolated thunderstorms. Locally heavy rain will bring flooding concerns over recently burned areas and steep terrain late Sunday afternoon into Monday.
- A warming and drying trend returns around the middle of next week.
Discussion
... Today through Monday: The slow moving low continues to move over the region. Precipitable water amounts continue to rise to 0.8-1.0 by Monday. The increasing moisture will bring a steady stream o...
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