FrostList

When to Winterize Your RV in Charleston, WV

ON TRACK117 days until first 28°F freezeNov 5

Charleston's median first 28°F hard freeze is November 5 (1991–2020 NOAA normals), and it can strike as early as October 24 — so winterize your RV in Charleston by October 26. Plan for the early end: the one-in-ten date lands about 12 days before the median.

OUTLOOK

Typical first first 28°F freeze near Nov 5; local deadline about Oct 26. The live 10-day outlook loads here.

Local freeze dates for Charleston

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 13Oct 26Nov 6
28°F (hard freeze)Oct 24Nov 5Nov 19
24°F (severe)Nov 2Nov 17Dec 5

NOAA station: Charleston Yeager AP · 3.1 mi away · 910 ft elevation.

Charleston draws its numbers from Charleston Yeager AP, 910 feet up and 3.1 miles away. Its median first-freeze dates are 32°F by Oct 26, 28°F by Nov 5, 24°F by Nov 17. Year to year the 28°F date has ranged from Oct 24 to Nov 19 — about 26 days apart. Spring's last 32°F freeze clears around Apr 16. Snowfall averages 32 inches a year, first reaching an inch near November.

Charleston usually sees its first 32°F night about Oct 26, with the first 28°F hard freeze close behind near Nov 5. That first freezing night has ranged from Oct 13 to Nov 6, roughly a 24-day spread. On the spring side, the last 32°F freeze clears around Apr 16 and as late as May 5 — the green light for reopening water and de-winterizing. With around 32 inches of snow annually, plan for a handful of plowable storms each winter.

Your rv checklist

  1. Drain the fresh, gray, and black tanks, then drain the water heater only after it has cooled and lost pressure.
  2. Bypass the water heater so you do not waste six gallons of antifreeze filling the tank.
  3. Blow out the lines with a compressor at about 30–40 psi, then pump non-toxic RV antifreeze through every faucet until it runs pink.
    Helpful gear: RV antifreeze (6-pack) — Recommended pick
  4. Use a water-pump converter kit to draw antifreeze straight from the jug through the plumbing.
    Helpful gear: Water pump converter kit — Recommended pick
  5. Pour a cup of antifreeze into each drain trap and the toilet to protect the seals.
  6. Fit a blow-out plug at the city-water inlet so you can clear that line too.
    Helpful gear: Blow-out plug — Recommended pick
  7. Remove batteries or put them on a maintainer, and store them off a cold concrete floor.
  8. Cover roof vents, close the propane, and set out traps or deterrents so mice do not move in.

What to have on hand

RV antifreeze (6-pack)
Non-toxic pink fluid for the fresh-water plumbing and traps.
Recommended pick
Water pump converter kit
Siphon kit that draws antifreeze straight through the pump.
Recommended pick
Blow-out plug
Adapter that lets a compressor clear the lines before antifreeze.
Recommended pick
Heated fresh-water hose
For anyone staying hooked up through a cold snap.
Recommended pick

What this means locally

Compared with nearby cities, Charleston's first-freeze date near Nov 5 sits close to Huntington (Nov 8) and later than Blacksburg (Oct 29). West Virginia's deadlines span Oct 26 to Oct 29 statewide — one date for all of West Virginia would be off by weeks for Charleston. Once you know Charleston's freeze date, use it to shut down your sprinklers and winterize a boat too.

Other winter jobs in Charleston

Every task below is dated to Charleston's own freeze and snow normals.

Sprinklers → Oct 26Frozen pipes → Oct 13Ice dams → Oct 16Car battery → Nov 5Snow blower → Oct 25Sump pump → Apr 16Boat → Oct 29Motorcycle → Oct 26

See the full Charleston winter checklist, in order →

Frequently asked questions

At what temperature do RV pipes freeze?
An RV's exposed plumbing and thin-walled tanks can begin to freeze once temperatures sit in the mid-20s for a few hours, sooner than a house because there is little insulation around the lines. That is why the winterizing deadline tracks the first 28°F freeze rather than the first light frost.
How much RV antifreeze do I need?
Most travel trailers and motorhomes take about two to three gallons of non-toxic RV antifreeze, and larger rigs more. Bypassing the water heater saves roughly six gallons you would otherwise waste filling the tank. Buy an extra jug; stores sell out once the first freeze warnings hit.
Can I just use my RV furnace instead of winterizing?
Relying on the furnace is risky. A propane run-out, a tripped breaker, or a dead battery during a cold night leaves the plumbing unprotected, and the furnace may not keep the underbelly and bays warm enough anyway. Draining and adding antifreeze is the dependable way to protect the system.
How do I winterize an RV water heater?
Let the tank cool and lose pressure, then drain it and, if fitted, pull the anode rod. Do not add antifreeze to the water heater tank; instead, set the bypass valves so antifreeze skips the tank and fills only the lines. Fresh antifreeze in an unbypassed heater just wastes several gallons.
When is it safe to de-winterize an RV in Charleston?
Wait until the last spring freeze has passed, which averages near Apr 16 here. De-winterize by flushing the antifreeze from the lines, sanitizing the fresh tank, and checking for leaks before a trip. Reopening too early risks a surprise late freeze on a charged system.
Do I need to winterize an RV stored indoors?
A reliably heated indoor space that stays above freezing protects the plumbing, so full winterizing may not be needed. But an unheated garage or barn can still drop below freezing on a cold night. If you cannot guarantee the space stays warm, winterize to be safe.

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