Weather WorldJefferson Lake, OR Weather Forecast
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Jefferson Lake Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY |
 | | |  |  |  | |  |  | | |
| Smoke | Smoke | Smoke | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy |
| Lo: 50°FLo: 10°C | Lo: 50°FLo: 10°C | Lo: 46°FLo: 8°C | Lo: 46°FLo: 8°C | |||||||
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1132 PM PDT Sun Aug 16 2026 
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Jefferson Lake Forecast Discussion
Issued: 1050 PM PDT Sun Aug 16 2026
Key Messages
- Southwest flow through Monday will bring shower and isolated thunderstorm chances mainly to far eastern Oregon.
- Breezy westerly winds and low relative humidity Tuesday afternoon and evening, especially across the Columbia Basin of Oregon.
- Another chance of showers and thunderstorms toward the weekend.
Discussion
... Southwest flow will continue through Monday. Several short waves will move through the flow. These short waves coupled with residual moisture ...