Tri-Cities, WA Weather Forecast
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Tri-Cities Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY |
| Patchy Fog | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Chance of Showers | Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 60°FHi: 16°C | Lo: 36°FLo: 2°C | Hi: 57°FHi: 14°C | Lo: 40°FLo: 4°C | Hi: 60°FHi: 16°C | Hi: 56°FHi: 13°C Lo: 36°FLo: 2°C | Hi: 56°FHi: 13°C Lo: 36°FLo: 2°C | Lo: 33°FLo: 1°C | Hi: 53°FHi: 12°C | Hi: 50°FHi: 10°C Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C Lo: 26°FLo: -3°C | Hi: 50°FHi: 10°C Lo: 26°FLo: -3°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 402 AM PDT Sun Oct 25 2026 

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Issued: 434 AM PDT Sun Oct 25 2026
Key Messages
- Dry conditions continue through the overnight hours with isolated freezing temperatures in the lower elevation areas.
- Pattern shifts through the week with periods of shower activity across the region.
- Cooler pattern develops through the week (50-70% chance) with high temperatures dropping down the low 50s in the lower elevated areas (50-70% chance).
Discussion
... Satellite advertises a low pressure system off the coast of the PacNW, bringing moderate to heavy showers west of the Casca...
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