Seattle · March
Run in the midday.
Cool month: average high 52°F, low 39°F. Humidity averages 80% — the limiting factor on most runs. Expect 19 rain days — plan around the radar. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
Avg high / low
52° / 39°F
Humidity
80%
Rain days
19/mo
Wind
12 mph
What March feels like in Seattle
Sunrise
07:19
Mid-month average
Sunset
19:16
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 March
The kit for March in Seattle: a long-sleeve or light jacket for the first mile, a water-resistant cap or jacket on standby.
March vs the surrounding months
vs February
+5° avg high
-1 rain days
Seattle in February →
March
52°F avg high
19 rain days
Best: midday
vs April
-5° avg high
+1 rain days
Seattle in April →
Frequently Asked Questions
What is the best time of day to run in Seattle in March?+
Midday. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
What's the average temperature in Seattle in March?+
Average high 52°F, average low 39°F.
How does March compare to surrounding months in Seattle?+
Compared to February (avg high 46°F), March is warmer. Compared to April (avg high 57°F), March is cooler.
Does it rain often in Seattle in March?+
Expect about 19 measurable rain days in March, on average.