FrostList

When to Winterize Your RV in Las Cruces, NM

ON TRACK136 days until first 28°F freezeNov 24

In a typical year, winterize your RV in Las Cruces by November 14. The median first 28°F hard freeze at Las Cruces's NOAA station is November 24 (1991–2020 normals); one year in ten it arrives as early as November 9. The early-to-late range spans roughly 29 days, so treat the median as a midpoint, not a promise.

OUTLOOK

Typical first first 28°F freeze near Nov 24; local deadline about Nov 14. The live 10-day outlook loads here.

Local freeze dates for Las Cruces

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 30Nov 13Nov 24
28°F (hard freeze)Nov 9Nov 24Dec 8
24°F (severe)Nov 21Dec 6Dec 29

NOAA station: State Univ · 2.6 mi away · 3,886 ft elevation.

Las Cruces draws its numbers from State Univ, 3,886 feet up and 2.6 miles away. Its median first-freeze dates are 32°F by Nov 13, 28°F by Nov 24, 24°F by Dec 6. The 28°F freeze has come as early as Nov 9 and as late as Dec 8, a 29-day spread. Spring's last 32°F freeze clears around Mar 12. Snowfall averages 1 inches a year.

Expect the first frost near Nov 13 in Las Cruces and the first hard freeze by about Nov 24. The 32°F date swings from Oct 30 at its earliest to Nov 24 at its latest, near 25 days. The last spring freeze averages Mar 12 and as late as Apr 2, which sets the safe window for reopening outdoor water and de-winterizing gear. Snow barely registers here; the freeze date, around Mar 12, is the one that matters.

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

Las Cruces freezes about a week ahead of El Paso (Dec 1) and later than Roswell (Nov 6) — a reminder that even nearby towns differ by days. Statewide, New Mexico prep dates run Oct 6 through Nov 14, which is why Las Cruces gets its own number rather than a New Mexico-wide average. The same freeze also decides when to shut down your sprinklers and winterize a boat.

Other winter jobs in Las Cruces

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

Sprinklers → Nov 14Frozen pipes → Oct 30Car battery → Nov 24Sump pump → Mar 12Boat → Nov 17Motorcycle → Nov 13

See the full Las Cruces 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 Las Cruces?
Wait until the last spring freeze has passed, which averages near Mar 12 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 State Univ, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.