Temperature at SEA Airport Hits 70 Degrees for First Time in 2026

The warm weather won't last as cooler air moves in over the next few days.

Apr. 6, 2026 at 10:53pm

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A sweeping, atmospheric landscape painting depicting the Seattle skyline and Puget Sound shrouded in a hazy, dramatic mist, conveying the overwhelming scale and power of the natural world.The early spring heat wave in Seattle offers a fleeting glimpse of summer, before the region's characteristic cool, cloudy conditions return.Seattle Today

The temperature at Seattle-Tacoma International Airport reached 70 degrees on Monday, the first time it has hit that mark so far in 2026. However, the warm weather is expected to be short-lived as a weather system pushes cooler air into the Puget Sound region over the next couple of days.

Why it matters

Reaching 70 degrees in early April is highly unusual for the Seattle area, where high temperatures typically hover in the 50s during this time of year. This early warm spell provides a preview of the potential impacts of climate change on regional weather patterns.

The details

According to data from the National Weather Service, the temperature at SEA Airport hit 70 degrees shortly before 3 p.m. on Monday. This is the first time temperatures have reached at least 70 degrees at the airport since October 6, 2025. The record high temperature for April 6 is 78 degrees, set in 2007.

  • The temperature at SEA Airport reached 70 degrees shortly before 3 p.m. on Monday, April 6, 2026.
  • The earliest 70-degree day recorded at SEA Airport was February 27, 1968.
  • The latest 70-degree day recorded at SEA Airport was May 23, 2003.

The players

National Weather Service

The federal agency responsible for weather forecasting and monitoring in the United States.

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What’s next

As the weather system moves farther inland over British Columbia, it will push cooler air into the Puget Sound region on Tuesday, with highs settling back into the mid- to upper-50s. The rest of the week is expected to be dry and partly sunny, with temperatures gradually warming again starting on Wednesday.

The takeaway

This early-season heat wave is a stark reminder of the impacts of climate change on regional weather patterns. While the warm spell will be short-lived, it highlights the need for continued efforts to address the long-term challenges posed by a changing climate.