FrostList

Winter Prep Checklist for Seattle, WA

Here's the order to prep Seattle, WA for winter, set by local freeze data. Your first deadline is November 1 — prevent frozen pipes — and the sequence runs through the cold season into spring below.

Your winter prep order for Seattle

  1. NovemberNovember 1 — Prevent Frozen PipesSee details →
  2. NovemberNovember 15 — Prevent Ice DamsSee details →
  3. NovemberNovember 17 — Store Your MotorcycleSee details →
  4. NovemberNovember 22 — Winterize SprinklersSee details →
  5. NovemberNovember 22 — Winterize Your RVSee details →
  6. NovemberNovember 24 — Prep Your Snow BlowerSee details →
  7. NovemberNovember 25 — Winterize Your BoatSee details →
  8. DecemberDecember 2 — Test Your Car BatterySee details →
  9. MarchMarch 13 — Test Your Sump PumpSee details →

Dates are local deadlines derived from NOAA 1991–2020 freeze and snowfall normals for Seattle. Live outlooks on each linked page can move the urgency earlier.

How the order is set

Each task is pinned to Seattle's own NOAA 1991–2020 freeze and snowfall normals, then ordered by its local deadline. Sprinklers, RVs, and boats key off the first 28°F freeze; pipes and motorcycles off the first freezing night; snow blowers and roofs off the first plowable snow. Follow any link for the live outlook and a checklist.

Data: NOAA 1991–2020 normals via Seattle Boeing Fld, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.