Seattle to See Highs of 63–65°F on September 30
Seattle to See Highs of 63–65°F on September 30
US · Published Sep 30, 2026
• Seattle is expected to experience daytime high temperatures ranging from 63°F to 65°F (17°C to 18°C) on September 30, 2026, according to forecasts from the National Weather Service and meteorological models.
• These conditions are typical for late September in the Pacific Northwest, with partly to mostly sunny skies, light northerly winds, and minimal cloud cover after morning patchy fog.

Impact & Risks

The forecasted temperatures and weather conditions are not expected to pose significant risks to residents or visitors in Seattle. However, the morning patchy fog could reduce visibility for drivers during early hours. The stable high-pressure system ensures minimal risk of severe weather, making it a calm and pleasant day overall. Those sensitive to cooler morning temperatures may want to dress in layers.

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