RV Winterization in Idaho

In Idaho, local rv deadlines run from Oct 3 to Oct 22, with a median around Oct 20 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Motorhome parked on a snowy street in falling snow — drain and antifreeze the water system before the first hard freeze — Idaho deadlines city by city — Photo: Arlind Photography / Unsplash

Jump to a city

Notable cities

Idaho Falls — earliest deadline in the state
Coeur d'Alene — latest deadline in the state
Caldwell — near the state median

All Idaho cities

City	Local deadline	Median first 28°F
Idaho Falls	Oct 3	Oct 13	View →	Checklist
Twin Falls	Oct 13	Oct 23	View →	Checklist
Pocatello	Oct 14	Oct 24	View →	Checklist
Nampa	Oct 15	Oct 25	View →	Checklist
Caldwell	Oct 20	Oct 30	View →	Checklist
Boise	Oct 21	Oct 31	View →	Checklist
Boise City	Oct 21	Oct 31	View →	Checklist
Meridian	Oct 21	Oct 31	View →	Checklist
Coeur d'Alene	Oct 22	Nov 1	View →	Checklist

Local rv winterization deadlines for Idaho cities — built from each city’s own NOAA station, not one statewide date.

RV Winterization in Idaho: related searches

Idaho homeowners search for: RV winterization checklist, how to winterize a camper, and "rv winterization near me" — every city page below answers those with local NOAA dates.

RV winterization checklisthow to winterize a camperRV antifreeze how many gallonswater heater bypass RVblow out RV water linesnon-toxic RV antifreezeRV low point drainwinterize travel trailer

Back to the national RV Winterization guide, or see the methodology. You can also compare how the rv winterization window shifts in Georgia and Illinois.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 25, 2026.