FrostList

When to Winterize Your RV in Evansville, IN

ON TRACK132 days until first 28°F freezeNov 20

Evansville's median first 28°F hard freeze is November 20 (1991–2020 NOAA normals), and it can strike as early as November 5 — so winterize your RV in Evansville by November 10. It's a short step from frost to a hard freeze: roughly 10 days on average.

OUTLOOK

Typical first first 28°F freeze near Nov 20; local deadline about Nov 10. The live 10-day outlook loads here.

Local freeze dates for Evansville

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Oct 27Nov 10Nov 25
28°F (hard freeze)Nov 5Nov 20Dec 6
24°F (severe)Nov 13Dec 1Dec 20

NOAA station: Evansville Museum · 0.5 mi away · 374 ft elevation.

For Evansville, the nearest NOAA station with freeze data is Evansville Museum, 0.5 miles out at 374 feet. Median first-freeze dates there run 32°F by Nov 10, 28°F by Nov 20, 24°F by Dec 1. The 28°F freeze has come as early as Nov 5 and as late as Dec 6, a 31-day spread. Spring's last 32°F freeze clears around Mar 29. Snowfall averages 11 inches a year, first reaching an inch near December.

Expect the first frost near Nov 10 in Evansville and the first hard freeze by about Nov 20. Year to year, the first 32°F night has fallen anywhere from Oct 27 to Nov 25 — about 29 days apart. Spring's final freeze lands near Mar 29 and as late as Apr 11, so that is when outdoor water and stored gear can safely come back online. Snow is light here, near 11 inches a year, so pipe and battery cold usually matters more than plowing.

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, Evansville's first-freeze date near Nov 20 sits later than Owensboro (Nov 13) and later than Bowling Green (Nov 10). Indiana's deadlines span Oct 18 to Nov 10 statewide — one date for all of Indiana would be off by weeks for Evansville. Once you know Evansville's freeze date, use it to shut down your sprinklers and winterize a boat too.

Other winter jobs in Evansville

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

Sprinklers → Nov 10Frozen pipes → Oct 27Ice dams → Nov 15Car battery → Nov 20Snow blower → Nov 24Sump pump → Mar 29Boat → Nov 13Motorcycle → Nov 10

See the full Evansville 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 Evansville?
Wait until the last spring freeze has passed, which averages near Mar 29 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 Evansville Museum, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.