Normal weather for Vashon in August
It's warm in August in Vashon with an average temperature of 26°C. Temperatures this month range from a low of 22°C to a high of 29°C. At night, you can expect temperatures between 14°C and 17°C.
In August, there is an average of 63 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Vashon in August |
London | ||
|---|---|---|---|
 Average Temperature |
26°C | 22°C | |
 High Temp |
29°C | 24°C | |
| Low Temp |
22°C | 19°C | |
 Total Precipitation |
63 mm | 60 mm | |
| Rainy Days |
8 days | 10 days | |
Start of August
The month of August starts in Vashon with hot temperatures, averaging around 27°C during the day and nights close to 16°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
Mid-August
By mid-August, the average daytime temperature stays the same at 27°C, with nights close to 16°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
End of August
By the end of August, the average daytime temperature in Vashon will be around 25°C, with nights close to 15°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
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UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit Vashon?
Want nice weather? Then August is a great time to be in Vashon. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Vashon in August
With 37°C, Vashon hit the highest temperature in the last 10 years in August 2020. The lowest daytime temperature in this month was 16°C in 2023. The extreme night temperatures ranged from a low of 9°C to a high of 22°C.
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Daily Temperature in August in Vashon
This chart shows the average daily temperatures, both day and night, for each day in August in Vashon, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Vashon
The chart below shows the average daily precipitation in August for Vashon, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 8 days of rain in Vashon.
Daily UV Index in August in Vashon
This chart shows the average daily UV index in August in Vashon, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Vashon Over the Years
This chart shows the average temperature in August in Vashon, measured in degrees Celsius, over the past years.
Total Precipitation in August in Vashon Over the Years
This chart shows the average precipitation in August in Vashon, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Vashon
Click on a specific day in August for detailed info on the typical weather on that day in Vashon. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Vashon
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Average Weather in Vashon by Month
Click on a month below to see detailed weather info for Vashon. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
