Weather WorldTri, WA Weather Forecast
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| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY |
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| Patchy Fog | Mostly Cloudy | Partly Sunny | Patchy Fog | Patchy Fog | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 53°FHi: 12°C | Lo: 35°FLo: 2°C | Hi: 53°FHi: 12°C | Lo: 30°FLo: -1°C | Hi: 51°FHi: 11°C | Lo: 33°FLo: 1°C | Hi: 53°FHi: 12°C | Hi: 53°FHi: 12°C Lo: 39°FLo: 4°C | Hi: 53°FHi: 12°C Lo: 39°FLo: 4°C | Hi: 53°FHi: 12°C Lo: 39°FLo: 4°C | Hi: 53°FHi: 12°C Lo: 39°FLo: 4°C |
| POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 401 AM PDT Thu Oct 29 2026 
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Issued: 403 AM PDT Thu Oct 29 2026
Key Messages
- Near- to below-normal temperatures through the weekend.
- Periodic showers through the week, then medium-high (40-80%) chance of precipitation for central/eastern Oregon and southeast Washington over the weekend.
Discussion
... Satellite imagery shows a broad low-pressure system located just west of Vancouver Island. This low is responsible for isolated showers across the forecast area, which radar reveals are predominantly confined to the mountains (especially the Cascades). Aside from ...