Seattle · May
Run in the morning.
Cool month: average high 64°F, low 49°F. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
64° / 49°F
Humidity
74%
Rain days
14/mo
Wind
10 mph
What May feels like in Seattle
Sunrise
05:31
Mid-month average
Sunset
20:40
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Seattle in May
The kit for May in Seattle: a long-sleeve or light jacket for the first mile, a water-resistant cap or jacket on standby.
May vs the surrounding months
vs April
+8° avg high
-4 rain days
Seattle in April →
May
64°F avg high
14 rain days
Best: morning
vs June
-5° avg high
+2 rain days
Seattle in June →
Frequently Asked Questions
What is the best time of day to run in Seattle in May?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Seattle in May?+
Average high 64°F, average low 49°F.
How does May compare to surrounding months in Seattle?+
Compared to April (avg high 57°F), May is warmer. Compared to June (avg high 70°F), May is cooler.
Does it rain often in Seattle in May?+
Expect about 14 measurable rain days in May, on average.