SeaTac Weather in July

SeaTac in July averages 25°C (77°F) during the day and 14°C (57°F) at night. This is the driest month of the year, and part of the summer season.

Rainfall in SeaTac in July

With the lowest rainfall figures of the year, conditions are ideal for exploring the outdoors. You can expect rain on around 4 days based on historical patterns, with 14 mm (0.6 in) average for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in SeaTac in July

July tends to be one of the excellent months in SeaTac, with 25°C (77°F) in the afternoon and 14°C (57°F) overnight. During July, you'll experience the summer season. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest. On average, it is the warmest month of the year.

Sunshine in SeaTac in July

The days are predominantly sunny, with an estimated total of around 312 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in SeaTac in July

July sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

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.