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Heisson, WA Weather Forecast
Heisson, WA Weather Forecast Date: 502 PM PDT Fri Sep 04 2026
The area/counties/county of: South Washington Cascade Foothills, including the cities of: Yacolt, Amboy, Lake Merwin, and Toutle.or toggle through each period.
Tonight... Partly cloudy with a slight chance of showers this evening, then mostly cloudy after midnight. Patchy fog. Lows in the upper 40s. Light and variable winds. Chance of rain 20%.
Saturday... Partly sunny. Patchy fog in the morning. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs around 70. Light and variable winds. Chance of rain 50%. Rainfall amounts around a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night... Mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. Light and variable winds, becoming light after midnight.
Sunday... Mostly cloudy in the morning, then partly sunny with a slight chance of showers in the afternoon. Highs in the lower 70s. Winds light. Chance of rain 20%.
Sunday Night... Mostly cloudy in the evening, then becoming partly cloudy. A 20% chance of showers. Patchy fog after midnight. Lows in the lower 50s. Winds light in the evening, becoming light and variable.
Labor Day... Mostly cloudy in the morning, then becoming mostly sunny. A 20% chance of showers. Highs in the lower 70s.
Monday Night... Partly cloudy. Patchy fog. Lows around 50.
Tuesday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s.
Tuesday Night... Partly cloudy. Lows in the lower 50s.
Wednesday... Mostly sunny. Highs in the lower 80s.
Wednesday Night... Mostly clear. Lows in the mid 50s.
Thursday... Mostly sunny with a 20% chance of rain. Highs in the upper 70s.
Thursday Night... Partly cloudy in the evening, then becoming mostly cloudy. A 40% chance of rain. Lows in the mid 50s.
POP = Probability of Precipitation
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