FrostList

Winter Prep Checklist for Sammamish, WA

Here's the order to prep Sammamish, WA for winter, set by local freeze data. Your first deadline is October 22 — prevent frozen pipes — and the sequence runs through the cold season into spring below.

Snow-covered home during a hard winter — the Sammamish, WA winter-prep checklist ordered by local freeze dates
Photo: Unsplash

Your winter prep order for Sammamish

  1. OctoberOctober 22 — Prevent Frozen PipesSee details →
  2. NovemberNovember 7 — Store Your MotorcycleSee details →
  3. NovemberNovember 15 — Prevent Ice DamsSee details →
  4. NovemberNovember 19 — Winterize SprinklersSee details →
  5. NovemberNovember 19 — Winterize Your RVSee details →
  6. NovemberNovember 22 — Winterize Your BoatSee details →
  7. NovemberNovember 24 — Prep Your Snow BlowerSee details →
  8. NovemberNovember 29 — Test Your Car BatterySee details →
  9. MarchMarch 30 — Test Your Sump PumpSee details →
NovDecJanFebMarAprFrozen pipesOct 22MotorcycleNov 7Ice damsNov 15SprinklersNov 19RVNov 19BoatNov 22Snow blowerNov 24Car batteryNov 29Sump pumpMar 30

All nine Sammamish deadlines, from NOAA Washington freeze and snowfall normals, plotted across the season.

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

How the order is set

Each task is pinned to Sammamish'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. Helping family or friends nearby? Compare the full winter checklist for Richland and Seattle.

Winter prep in Sammamish: related searches

This page answers the questions Sammamish homeowners search every fall: when to winterize sprinklers in Sammamish, when the first freeze usually hits Washington, when to blow out irrigation lines, protect pipes, and get the snow blower serviced — all from the nearest NOAA station, not a national average.

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Data: NOAA 1991–2020 normals via Snoqualmie Falls, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 25, 2026.