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Tum Lake Weather Forecast
| REST OF TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  |  | |  | | |  |  | |  |
| Partly Cloudy | Mostly Sunny | Mostly Cloudy | Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Snow Showers |
| Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 36°FLo: 2°C | Hi: 55°FHi: 13°C | Lo: 39°FLo: 4°C | Hi: 60°FHi: 16°C Lo: 36°FLo: 2°C | Hi: 60°FHi: 16°C Lo: 36°FLo: 2°C | Lo: 30°FLo: -1°C | ||||
| POP: 20% | POP: 20% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1132 PM PDT Sat Oct 17 2026 
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Issued: 1035 PM PDT Sat Oct 17 2026
Key Messages
- Breezy to locally windy through the Cascade gaps and across much of the Columbia Plateau this afternoon and evening.
- Cooler, near-normal temperatures Sunday into next week in the wake of today`s cold frontal passage.
- Mostly dry conditions continue into next week. Low (20-40%) chance of precipitation across the Blue Mountains by late Wednesday, expanding to cover the Cascade and Blue Mountains Thursday through the remainder of the week.
Discussion
... Satellite shows a weak cold front p...