Harman US

Seattle, WA Weather & Growing Conditions

Tonight
54°F
Mostly Cloudy
Mostly cloudy, with a low around 54. East southeast wind around 1 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 54°F Mostly Cloudy 1 mph ESE 0%
Saturday 71°F Partly Sunny 3 mph WSW 0%
Saturday Night 54°F Mostly Clear 3 mph N 0%
Sunday 71°F Mostly Sunny 2 to 6 mph N 0%
Sunday Night 54°F Mostly Clear 1 to 6 mph N 0%
Monday 70°F Mostly Sunny 3 mph N 0%
Monday Night 55°F Partly Cloudy 1 to 5 mph NNE 1%
Tuesday 68°F Partly Sunny 3 mph NNE 1%
Tuesday Night 54°F Mostly Cloudy 2 mph ENE 9%
Wednesday 66°F Partly Sunny then Slight Chance Light Rain 1 to 5 mph SSW 16%
Wednesday Night 54°F Slight Chance Light Rain then Mostly Cloudy 5 mph NNE 16%
Thursday 63°F Mostly Cloudy then Slight Chance Light Rain 2 to 8 mph N 20%
Thursday Night 53°F Slight Chance Light Rain 2 to 8 mph N 20%
Friday 62°F Partly Sunny then Slight Chance Light Rain 2 to 7 mph N 15%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Seattle, WA

Last spring frost
Mar 13
First fall frost
Nov 17
Growing season
247 days
Hardiness zone
9a

Explore more for Seattle, WA: full frost dates · planting calendar · Washington frost dates

Climate data from the nearest NOAA station, Seattle Boeing Fld, Wa (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.