SeaTac Weather in August

August is one of the excellent 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 excellent 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.