FrostList

When to Winterize Your RV in West Valley City, UT

ON TRACK122 days until first 28°F freezeNov 10

West Valley City's median first 28°F hard freeze is November 10 (1991–2020 NOAA normals), and it can strike as early as October 27 — so winterize your RV in West Valley City by October 31. Year to year the date swings about 28 days, which is why the live outlook beats the calendar.

OUTLOOK

Typical first first 28°F freeze near Nov 10; local deadline about Oct 31. The live 10-day outlook loads here.

Local freeze dates for West Valley City

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 17Oct 31Nov 13
28°F (hard freeze)Oct 27Nov 10Nov 24
24°F (severe)Nov 5Nov 21Dec 6

NOAA station: Salt Lake City Intl AP · 6.2 mi away · 4,225 ft elevation.

For West Valley City, the nearest NOAA station with freeze data is Salt Lake City Intl AP, 6.2 miles out at 4,225 feet. Median first-freeze dates there run 32°F by Oct 31, 28°F by Nov 10, 24°F by Nov 21. That hard freeze has landed anywhere from Oct 27 to Nov 24, a swing of roughly 28 days. Spring's last 32°F freeze clears around Apr 8. Snowfall averages 52 inches a year, first reaching an inch near November.

In West Valley City, freezing nights (32°F) typically begin around Oct 31 and the first hard freeze (28°F) follows near Nov 10. Year to year, the first 32°F night has fallen anywhere from Oct 17 to Nov 13 — about 27 days apart. Spring's final freeze lands near Apr 8 and as late as Apr 30, so that is when outdoor water and stored gear can safely come back online. With about 52 inches of snow a year, roof, snow-blower, and ice-dam prep all belong on the same calendar.

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

West Valley City freezes about a week ahead of Taylorsville (Nov 18) and later than Murray (Oct 29) — a reminder that even nearby towns differ by days. Statewide, Utah prep dates run Oct 4 through Nov 10, which is why West Valley City gets its own number rather than a Utah-wide average. The same freeze also decides when to shut down your sprinklers and winterize a boat.

Other winter jobs in West Valley City

Every task below is dated to West Valley City's own freeze and snow normals.

Sprinklers → Oct 31Frozen pipes → Oct 17Ice dams → Oct 16Car battery → Nov 10Snow blower → Oct 25Sump pump → Apr 8Boat → Nov 3Motorcycle → Oct 31

See the full West Valley City 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 West Valley City?
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 Salt Lake City Intl AP, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.