Weather WorldObservation Peak Trail, WA 7-Day Night Weather Forecast
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Observation Peak Trail, WA Weather Forecast
Observation Peak Trail, WA Weather Forecast Date: 1128 PM PDT Fri Aug 28 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.
Overnight... Partly cloudy late this evening, then mostly cloudy with a chance of rain. Snow level 7000 feet. West wind 5 to 10 mph. Chance of rain 50%. Rainfall amounts less than a tenth of an inch.
Saturday... Mostly cloudy in the morning, then becoming partly sunny. A 50% chance of rain. Snow level 6500 feet. West wind 10 to 15 mph. Rainfall amounts around a tenth of an inch.
Saturday Night... Partly cloudy in the evening, then becoming mostly cloudy. Patchy dense fog after midnight. Free air freezing level 8000 feet, increasing to free air freezing level 10000 feet after midnight. Northwest wind 5 to 10 mph.
Sunday... Partly sunny. Free air freezing level 11000 feet, increasing to free air freezing level 12000 feet in the afternoon. 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. Northwest wind 5 to 10 mph, becoming light after midnight.
Monday... Sunny. Free air freezing level 13000 feet.
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... Mostly cloudy with a 50% chance of rain. Snow level above 8000 feet.
Wednesday... Rain likely. Snow level 8000 feet. Chance of rain 70%.
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
Observation Peak Trail Radar Loop
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