In September, Seattle averages a high of 71°F (22°C) and a low of 53°F (12°C). Most runs feel like about 62°F (17°C) once you factor in a typical morning or evening start, so dress for that number rather than the thermometer. Cool, damp, and rarely extreme — Seattle is all about staying dry without overheating.
71°F (22°C)
53°F (12°C)
Feels like 62°F (17°C)
Almost any time works this month. Early mornings are coolest if you prefer to avoid the 71°F (22°C) afternoon high.
Short Sleeve Tech Shirt
Breathable running tee
Running Shorts
Lightweight with built-in brief
Running Shoes
Your regular training shoes
$85
$50
$349
$17
$16
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In September, Seattle runs feel like about 62°F (17°C). A short or long-sleeve tech shirt with shorts or light tights is ideal. Carry a packable layer if it is windy.
September is some of the best running weather of the year in Seattle, with average highs near 71°F (22°C) and lows near 53°F (12°C).
Shorts are the standard in Seattle in September. At feels-like 62°F (17°C) tights will leave you overheating.
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