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Isinglass Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 76°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 80°FHi: 27°C | Lo: 53°FLo: 12°C | Hi: 86°FHi: 30°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C Lo: 56°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 53°FLo: 12°C | Hi: 80°FHi: 27°C Lo: 53°FLo: 12°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 239 AM PDT Fri Sep 18 2026 
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Issued: 131 PM PDT Fri Sep 18 2026
Key Messages
- Low impact weather expected this weekend and through much of next week.
- Cooler than normal temperatures continue today, returning to seasonable values this weekend and through next week. High temperatures peak around 5-10 degrees above normal on Sunday.
- Dry conditions expected through at least Thursday next week. Next chance for precipitation possible next weekend (9/25-9/27).
Discussion
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An upper level low remains situated over south eastern Oregon near the Idaho border this afterno...