Weather WorldJohn Sam Lake, WA Weather Forecast
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John Sam Lake Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Mostly Clear | Mostly Cloudy | Chance of Showers | Showers Likely | Chance of Showers | Chance of Rain | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Rain | Chance of Rain |
| Lo: 57°FLo: 14°C | Hi: 76°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 66°FHi: 19°C | Lo: 57°FLo: 14°C | Hi: 73°FHi: 23°C | Lo: 53°FLo: 12°C | Hi: 77°FHi: 25°C | Lo: 53°FLo: 12°C | Hi: 76°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 PM PDT Thu Aug 20 2026 
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Issued: 755 PM PDT Thu Aug 20 2026
Aviation
... VFR this afternoon with mostly clear skies. A weak push of marine stratus will bring IFR/LIFR conditions to the coast this evening into Friday morning. The stratus will attempt to push into OLM, but don`t expect reach Puget Sound terminals. Reductions in visibility highly likely with the stratus. Additionally, patchy fog possible in the valleys of the southern interior and northern interior. Mid-to- high clouds will increase Friday morning with condition...