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Thomas Lake, WA Weather Forecast
Thomas Lake, WA Weather Forecast Date: 1128 AM PDT Sat Aug 29 2026
The area/counties/county of: South Washington Cascades, including the cities of: Mt. St. Helens, Larch Mountain, and Indian Heaven Wilderness.or toggle through each period.
This Afternoon... A slight chance of thunderstorms early. Partly sunny with a chance of rain. Snow level 6500 feet. West wind 10 to 15 mph. Chance of rain 50%. Rainfall amounts less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight... Partly cloudy. Free air freezing level 9000 feet, increasing to free air freezing level 10000 feet after midnight. Northwest wind 5 to 10 mph.
Sunday... Partly sunny in the morning, then clearing. Free air freezing level 12000 feet. Northwest wind 5 to 10 mph.
Sunday Night... Mostly clear. Free air freezing level 12000 feet, increasing to free air freezing level 13000 feet after midnight. Winds light.
Monday... Sunny. Free air freezing level 13000 feet. Winds light.
Monday Night... Partly cloudy in the evening, then becoming mostly cloudy. Free air freezing level 13000 feet.
Tuesday... Partly sunny with a 20% chance of rain. Snow level above 8000 feet.
Tuesday Night... Rain likely with a slight chance of thunderstorms. Snow level above 8000 feet. Chance of rain 70%.
Wednesday... Rain showers with a slight chance of thunderstorms. Snow level 8000 feet. Chance of rain 90%.
Wednesday Night... Rain. Snow level 7500 feet. Chance of rain 90%.
Thursday... Rain likely. Snow level 7000 feet. Chance of rain 70%.
Thursday Night... Mostly cloudy with a 50% chance of rain. Snow level 7000 feet.
POP = Probability of Precipitation
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