FrostList

Winter Prep Checklist for Boulder, CO

Here's the order to prep Boulder, CO for winter, set by local freeze data. Your first deadline is August 16 — prevent ice dams — and the sequence runs through the cold season into spring below.

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

Your winter prep order for Boulder

  1. AugustAugust 16 — Prevent Ice DamsSee details →
  2. AugustAugust 25 — Prep Your Snow BlowerSee details →
  3. SeptemberSeptember 21 — Prevent Frozen PipesSee details →
  4. OctoberOctober 5 — Winterize SprinklersSee details →
  5. OctoberOctober 5 — Winterize Your RVSee details →
  6. OctoberOctober 5 — Store Your MotorcycleSee details →
  7. OctoberOctober 8 — Winterize Your BoatSee details →
  8. OctoberOctober 15 — Test Your Car BatterySee details →
  9. MayMay 6 — Test Your Sump PumpSee details →
SepOctNovDecJanFebMarAprMayJunIce damsAug 16Snow blowerAug 25Frozen pipesSep 21SprinklersOct 5RVOct 5MotorcycleOct 5BoatOct 8Car batteryOct 15Sump pumpMay 6

All nine Boulder deadlines, from NOAA Colorado freeze and snowfall normals, plotted across the season.

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

How the order is set

Each task is pinned to Boulder'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 Aurora and Broomfield.

Winter prep in Boulder: related searches

This page answers the questions Boulder homeowners search every fall: when to winterize sprinklers in Boulder, when the first freeze usually hits Colorado, 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 Boulder, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 25, 2026.