Seattle to See Mild Highs of 64–67°F with Cloudy Skies on September 15
Seattle to See Mild Highs of 64–67°F with Cloudy Skies on September 15
US · Published Sep 15, 2026
Seattle is expected to experience mild weather on September 15, 2026, with high temperatures ranging between 64–67°F (18–19°C).
According to forecasts from WindBorne Systems and other regional outlooks, the day will feature mostly cloudy skies with a chance of light showers or drizzle.

Impact & Risks

The mild temperatures and overcast conditions are not expected to pose significant risks to residents or travelers in the Seattle area. However, the chance of light showers or drizzle may lead to slightly damp conditions, which could affect outdoor activities. Those sensitive to cooler weather or planning outdoor events should prepare for the possibility of light rain and cooler temperatures compared to the seasonal average of 71°F (22°C).

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