SeaTac Weather in May
SeaTac in May sees pleasant daytime temperatures of 19°C (66°F) and nighttime lows of 9°C (48°F). Moderate rainfall is typical, with around 54 mm (2.1 in) for the month.
Rainfall in SeaTac in May
You can expect rain on around 12 days based on historical patterns, with 54 mm (2.1 in) average for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in SeaTac in May
In May, expect pleasant temperatures in SeaTac, with highs of 19°C (66°F) and lows of 9°C (48°F) at night. The difference between afternoon and evening temperatures is usually noticeable. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in SeaTac in May
Enjoy a sunny month with about 254 hours of sunshine, the clear skies make SeaTac even more beautiful.
Wind Speed in SeaTac in May
May 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.For SeaTac itself, June, July, August and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
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 May
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Chance of Rain
40%
Precipitation
54 mm (2.1 in)
Rainy days
12 days
Humidity
68% *
Windspeed
4 m/s (8 knots) *
Sunshine
254 hours *
Percentage Sunshine
54% *
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in SeaTac in May
For SeaTac in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in SeaTac in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
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.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full SeaTac climate overview or explore weather in the United States of America.
