FrostList

When to Winterize Your RV in Medford, OR

ON TRACK125 days until first 28°F freezeNov 13

Medford's median first 28°F hard freeze is November 13 (1991–2020 NOAA normals), and it can strike as early as October 26 — so winterize your RV in Medford by November 3. The early-to-late range spans roughly 44 days, so treat the median as a midpoint, not a promise.

OUTLOOK

Typical first first 28°F freeze near Nov 13; local deadline about Nov 3. The live 10-day outlook loads here.

Local freeze dates for Medford

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 14Oct 29Nov 16
28°F (hard freeze)Oct 26Nov 13Dec 9
24°F (severe)Nov 7Dec 3Jan 7

NOAA station: Medford Rogue Vly AP · 3.8 mi away · 1,297 ft elevation.

The reference station for Medford is Medford Rogue Vly AP (3.8 mi, 1,297 ft). First freeze there: 32°F by Oct 29, 28°F by Nov 13, 24°F by Dec 3. That hard freeze has landed anywhere from Oct 26 to Dec 9, a swing of roughly 44 days. Spring's last 32°F freeze clears around Apr 8. Snowfall averages 3 inches a year, first reaching an inch near January.

Expect the first frost near Oct 29 in Medford and the first hard freeze by about Nov 13. The 32°F date swings from Oct 14 at its earliest to Nov 16 at its latest, near 33 days. The last spring freeze averages Apr 8 and as late as Apr 30, which sets the safe window for reopening outdoor water and de-winterizing gear. At about 3 inches of snow a year, the freeze — not snow load — is the thing to plan around.

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

Medford freezes close to Springfield (Nov 11) and close to Eugene (Nov 11) — a reminder that even nearby towns differ by days. Statewide, Oregon prep dates run Sep 24 through Dec 11, which is why Medford gets its own number rather than a Oregon-wide average. The same freeze also decides when to shut down your sprinklers and winterize a boat.

Other winter jobs in Medford

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

Sprinklers → Nov 3Frozen pipes → Oct 14Ice dams → Dec 16Car battery → Nov 13Snow blower → Dec 25Sump pump → Apr 8Boat → Nov 6Motorcycle → Oct 29

See the full Medford 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 Medford?
Wait until the last spring freeze has passed, which averages near Apr 8 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 Medford Rogue Vly AP, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.