The 2025 event has concluded.
Seattle Marathon
Seattle, WA, USA • November 30, 2025
Race Day Weather
29°
46° high
Light
Dry
Cold start, moderate winds
Runners will face a chilly temperature range from 29°F at the start to a mild 45°F by the finish, with an average humidity of 87%. Light winds from the east will create headwinds in the early miles and again around mile 6, challenging runners on climbs. It is advisable to dress warmly and consider adjusting pacing strategies during the tougher segments, particularly where headwinds are present.
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Distance: 26.2mi
0:00:00
HH:MM:SS
The Seattle Marathon is an annual marathon held in Seattle, Washington, USA, around the last Sunday in November. It was first held in 1970. Wikipedia
FAQ
When is the 2025 Seattle Marathon?
The 2025 Seattle Marathon will be held on Sunday November 30, 2025.
Is the Seattle Marathon a Boston Marathon Qualifier?
Yes, the Seattle Marathon is an official Boston Marathon qualifier.
What will the weather be like for the 2025 Seattle Marathon?
The forecast calls for a high of 46°F and a low of 29°F with a 0% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.
Historical Weather
Based on 24 years of data
Avg Temp
46°F
L:40° H:47°
RunScore
Conditions
Rain Freq
42%
10 of 24 yrs
Wind8mph
Dew39°F
Temperature History
Range of temperatures during race hours for each year.
