SeaTac Weather in August

August is one of the perfect months to visit SeaTac, with daytime temperatures of 25°C (77°F) and lows of 14°C (57°F) at night. Some rainfall is typical for this time of year.

Rainfall in SeaTac in August

Based on our climate data of the past 30 years, about 4 days of rain are anticipated, with 22 mm (0.9 in) on average. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.

Temperature in SeaTac in August

Weather in SeaTac is at its perfect in August. Highs reach 25°C (77°F), while nights settle around 14°C (57°F). August marks the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 14°C (57°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in SeaTac in August

Expect sunny days throughout the month, with an estimated 280 hours of sunshine. This makes it a pleasant time to visit SeaTac.

Wind Speed in SeaTac in August

Wind speeds average 4 m/s (8 knots) during August. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for SeaTac.

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For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.

SeaTac Temperature in August

Min Temperature 14°C (57°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 14%  

Precipitation 22 mm (0.9 in)  

Rainy days 4 days  

Humidity 68% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 280 hours *  

Percentage Sunshine 64% *  

What to Wear in SeaTac in August

Warm but pleasant conditions in SeaTac in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in SeaTac in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.

More climate data for SeaTac

Temperature Rainfall Sunshine Humidity Wind Speed

See the full SeaTac climate overview or explore weather in the United States of America.