FrostList

When to Winterize Your RV in Sterling Heights, MI

ON TRACK115 days until first 28°F freezeNov 3

Sterling Heights's median first 28°F hard freeze is November 3 (1991–2020 NOAA normals), and it can strike as early as October 20 — so winterize your RV in Sterling Heights by October 24. Cold deepens quickly here — only about 10 days separate the first frost from that hard freeze.

OUTLOOK

Typical first first 28°F freeze near Nov 3; local deadline about Oct 24. The live 10-day outlook loads here.

Local freeze dates for Sterling Heights

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 7Oct 24Nov 3
28°F (hard freeze)Oct 20Nov 3Nov 15
24°F (severe)Nov 1Nov 13Nov 28

NOAA station: Mt Clemens Ang Base · 11.0 mi away · 580 ft elevation.

Numbers for Sterling Heights come from Mt Clemens Ang Base, 11.0 miles away at 580 feet, where the medians fall 32°F by Oct 24, 28°F by Nov 3, 24°F by Nov 13. The 28°F freeze has come as early as Oct 20 and as late as Nov 15, a 26-day spread. Spring's last 32°F freeze clears around Apr 30. Snowfall averages 32 inches a year, first reaching an inch near November.

In Sterling Heights, freezing nights (32°F) typically begin around Oct 24 and the first hard freeze (28°F) follows near Nov 3. That first freezing night has ranged from Oct 7 to Nov 3, roughly a 27-day spread. On the spring side, the last 32°F freeze clears around Apr 30 and as late as May 15 — 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, Sterling Heights's first-freeze date near Nov 3 sits about a week ahead of Warren (Nov 9) and close to Troy (Nov 4). Michigan's deadlines span Oct 13 to Oct 30 statewide — one date for all of Michigan would be off by weeks for Sterling Heights. Once you know Sterling Heights's freeze date, use it to shut down your sprinklers and winterize a boat too.

Other winter jobs in Sterling Heights

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

Sprinklers → Oct 24Frozen pipes → Oct 7Ice dams → Oct 16Car battery → Nov 3Snow blower → Oct 25Sump pump → Apr 30Boat → Oct 27Motorcycle → Oct 24

See the full Sterling Heights 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 Sterling Heights?
Wait until the last spring freeze has passed, which averages near Apr 30 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 Mt Clemens Ang Base, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.