See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
17°
Partly Cloudy
Feels Like: 6°
Min: 12°
Max: 18°
The next few hours will be partly cloudy, with today reaching 18°C and dropping to 11°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:53
Sunrise
19:16
Sunset
Moon
Waxing Crescent
11:07
Moonrise
20:06
Moonset
Daily Forecast
Monday
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
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Weather in Vashon tomorrow, September 15, 2026
Conditions in Vashon on September 15, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. The morning sky stays heavily clouded, with cover near 100% around 00:00. Grey conditions set the early tone before any later change.
The temperature range runs from about 11°C up to 15°C. The air stays humid, with relative humidity between 69% and 91% and the peak around 05:00. A lighter breeze peaks around 17:00 near 7.2 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 91% around 17:00. Outdoor plans may still want a flexible backup. Expect visibility near 15.4 km, with poorer spells close to 11.1 km. Sunrise is at 06:54 and sunset at 19:14, giving 12 hours 19 minutes of sunlight today.
Taken together, settled sunshine in Vashon on September 15, 2026 makes outdoor timing easier, with highs near 15°C.
Frequently asked questions about weather in Vashon
How warm does it get in Vashon?
The warmest month in Vashon is August, with average high temperatures of 25°C. The average temperature during this period is around 20°C.
How cold does it get in Vashon?
The coldest month in Vashon is February, with average low temperatures of 4°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Vashon?
The wettest month in Vashon is December, with an average of 182mm of precipitation.
What is the driest time of year in Vashon?
The driest month in Vashon is July, with an average of 15mm of precipitation.
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