Simon Lake, OR Weather Forecast
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Simon Lake Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SUNDAY | MONDAY |
| Clearing | Mostly Clear | Clearing | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 40°FLo: 4°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C Lo: 46°FLo: 8°C | Hi: 79°FHi: 26°C Lo: 46°FLo: 8°C | Hi: 79°FHi: 26°C Lo: 46°FLo: 8°C | Hi: 79°FHi: 26°C Lo: 46°FLo: 8°C | Hi: 79°FHi: 26°C Lo: 46°FLo: 8°C | |||
POP = Probability of Precipitation.
Weather Outlook Updated: 401 AM PDT Tue Sep 29 2026 

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Issued: 413 AM PDT Tue Sep 29 2026
Key Messages
- Light to moderate mountain showers across the WA Cascades and Northern Blues today
- Breezy winds through the Columbia Basin and Eastern Columbia River Gorge this afternoon
- Near to above normal temperatures, mostly dry conditions, and light winds develop into early next week
Discussion
...Nighttime satellite imagery tonight shows increasing mid to upper level cloud cover from northwest to southeast. Meanwhile radar is showing returns mostly over northwest WA at this time, with returns sl...
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