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Harper, WA Weather Forecast
Harper, WA Weather Forecast Date: 236 PM PDT Thu Sep 10 2026
The area/counties/county of: City Of Seattle, including the city of Downtown Seattle.or toggle through each period.
Tonight... Mostly cloudy. Lows in the mid to upper 50s. Light wind becoming south to 10 mph after midnight.
Friday... Mostly cloudy. Highs in the mid 60s to lower 70s. South wind to 10 mph.
Friday Night... Cloudy. Lows in the mid to upper 50s. Light wind.
Saturday... Mostly cloudy. A slight chance of rain in the afternoon. Highs in the mid 60s to lower 70s. Light wind.
Saturday Night... Showers likely and a slight chance of thunderstorms in the evening, then rain at times after midnight. Rainfall amounts a tenth to a quarter of an inch possible, except higher amounts possible in thunderstorms. Lows in the mid 50s. Light wind becoming south to 10 mph after midnight.
Sunday... Cloudy with rain likely in the morning, then mostly cloudy with a chance of rain in the afternoon. Highs in the upper 60s.
Sunday Night... Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 50s.
Monday... Mostly cloudy. Highs near 70.
Monday Night... Mostly clear. Lows in the lower to mid 50s.
Tuesday... Mostly sunny. Highs in the lower to mid 70s.
Tuesday Night... Mostly clear. Lows in the mid 50s.
Wednesday... Sunny. Highs in the 70s.
Wednesday Night... Clear. Lows in the mid to upper 50s.
POP = Probability of Precipitation
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