Lake Merwin Weather Forecast
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Rain Showers
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Rain
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Rain
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Rain
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Rain Showers
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Rain Showers Likely
Today 13 Mar South Washington Cascade Foothills
A chance of rain Showers with a slight chance of Thunderstorms this Morning, then rain Showers with a slight chance of Thunderstorms this afternoon. Some Thunderstorms may produce small hail this afternoon. Snow level 1500 feet. Highs in the mid 40s. Southwest wind 5 to 10 Mph. Chance of rain 90 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.
Tonight 13 Mar South Washington Cascade Foothills
A chance of snow Showers. Rain Showers with a slight chance of Thunderstorms in the Evening, then a chance of rain Showers after midnight. Some Thunderstorms may produce small hail in the evening. Snow level 1000 feet. Snow accumulation up to 1 inch. Lows in the lower 30s. South wind 5 to 10 Mph. Chance of precipitation 90 percent. Rainfall Amounts a tenth to a quarter of an inch.
Lake Merwin Temperature Statistics
March Temperature
Southwest Washington Regional Airport (22.4 miles)
Lowest 6 March, 2025
30.9 °FAverage March
46.5 °FHighest 1 March, 2025
61 °F
Climate (2020–Present)
Southwest Washington Regional Airport (22.4 miles)
Average Low 2020–2025
44.9 °FAverage 2020–2025
52.6 °FAverage High 2020–2025
62.1 °F