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THEHVAC STANDARD

Independent HVAC reporting for homeowners and HVAC professionals.

LOCAL · SEATTLE–TACOMA

Seattle–Tacoma HVAC: King, Pierce and Snohomish counties

Our Seattle–Tacoma coverage spans the Puget Sound metro as the federal government draws it: King, Pierce and Snohomish counties, in three metropolitan divisions. Below: the official boundary, what power costs in Washington, the climate, and the questions Puget Sound homeowners ask most.

Residential street in Tacoma, Washington, with houses, trees and water in the distance

The Seattle–Tacoma market at a glance

LAST CHECKED OCT 2, 2026
METRO BOUNDARY
Seattle-Tacoma-Bellevue, WA Metropolitan Statistical AreaCore-based statistical area (CBSA) code 42660.
3 member counties:
  • King (Seattle-Bellevue-Kent division)
  • Pierce (Tacoma-Lakewood division)
  • Snohomish (Everett division)
Source: OMB Bulletin No. 23-01 (July 21, 2023), Census delineation file (opens in a new tab)
WASHINGTON HOME ELECTRICITY
14.71¢/kWhAverage residential electricity price in Washington, July 2026. The U.S. average that month was 18.31¢/kWh.
Source: EIA Electric Power Monthly, Table 5.6.A (opens in a new tab)
CLIMATE NORMALS (1991–2020)
Cooling degree days
265.0
Heating degree days
4,375.8
Annual normals, base 65°F (NCEI readme (opens in a new tab)), at NOAA station USW00024233 (Seattle-Tacoma International Airport).
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 (opens in a new tab)