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Thomas Lake, WA Weather Forecast
Thomas Lake, WA Weather Forecast Date: 501 PM PDT Tue Oct 20 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.
Tonight... Mostly clear. Free air freezing level 11000 feet. East wind 10 to 15 mph.
Wednesday... Sunny. Free air freezing level 11000 feet. Southeast wind 5 to 10 mph.
Wednesday Night... Mostly clear. Free air freezing level 11000 feet. Light and variable winds, becoming light after midnight.
Thursday... Mostly sunny. Free air freezing level 10000 feet. Winds light, becoming west 5 to 10 mph in the afternoon.
Thursday Night... Mostly cloudy. Free air freezing level 8000 feet, Decreasing to free air freezing level 5500 feet after midnight. West wind 10 to 15 mph. Gusts up to 40 mph after midnight.
Friday... Partly sunny in the morning, then clearing. Free air freezing level 5000 feet.
Friday Night... Mostly clear in the evening, then becoming partly cloudy. Areas of frost. Free air freezing level 10000 feet.
Saturday... Partly sunny with a slight chance of rain and snow. Snow level 4500 feet. Chance of precipitation 20%.
Saturday Night... Mostly cloudy with a 50% chance of rain. Snow level 6000 feet.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. A 40% chance of rain. Snow level 6000 feet.
Sunday Night... Mostly cloudy in the evening, then becoming partly cloudy. A 20% chance of rain. Snow level 6000 feet.
Monday... Mostly sunny with a 20% chance of rain. Snow level 6000 feet.
Monday Night... Partly cloudy with a slight chance of rain and snow. Snow level 6000 feet. Chance of precipitation 20%.
POP = Probability of Precipitation
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