How cold does it have to be for pipes to freeze?

Author: Carli Cartwright  |  Last update: Monday, August 25, 2025

Pipes can freeze at temperatures below 32 degrees, but most insulated pipes start to freeze at temperatures below 20 degrees, according to Angi, a website that provides information on home improvement projects. If a cold snap lasts for more than four to six hours, your pipes could burst, according to Angi.

How cold does it have to be for pipes to freeze in a house?

We all know that freezing begins at 32° F or 0° C, but at what point do pipes freeze within our own homes? Temperatures only need to drop to about 20° F for a few hours to put exposed pipes at risk.

Will my pipes freeze in one night?

Can pipes freeze in one night? As surprising as it might sounds, HVAC expert Josh Rudin says, 'Water pipes with cold water in them experiencing freezing temperatures in the evening can absolutely freeze and burst all in one evening.

At what temperature do you need to drip your faucet?

So, exactly how cold does it need to be before you do this? Southern Living says professionals list the threshold temperature for pipes to freeze at 20 degrees Fahrenheit, meaning this or anything below can create a potential for water to turn to ice in your pipes.

Will my pipes freeze if my heat is on 60?

Keep the Heat On

The ideal temperature would be around 55 to 60 degrees. This will be warm enough to keep pipes from freezing.

How cold does it have to be for pipes to freeze and burst?

Will pipes freeze if house is 55 degrees?

Your pipes are at risk of freezing any time temperatures drop below 32°F. However, it's much more common for pipes to freeze when temperatures dip below 20°F. The longer the weather remains below freezing, the more likely it is your pipes can freeze if not properly protected and winterized.

Will shutting off water keep pipes from freezing?

Prevent Frozen Pipes

Moving water keeps pipes from freezing. Find shut off valves for emergencies. Insulate pipes in unheated areas. Open cupboards and vanities to warm pipes.

At what temperature should I cover my outside faucets?

Pipes can freeze whenever the temperature is below 32 degrees Fahrenheit. Insulated pipes are most likely to freeze at 20 degrees or colder. Drip or cover faucets when it's 28 degrees or colder for three or more hours.

Will dripping water stop pipes from freezing?

A common misconception is that the drip prevents water from freezing because it stays in motion when it's running through the pipes. Although this helps, the truth is that at extreme temperatures water can freeze even while it is flowing.

At what temperature does water freeze?

Water's freezing point is generally accepted to be 32 degrees Fahrenheit.

Where do pipes freeze first?

Likely places for frozen pipes include against exterior walls or where your water service enters your home through the foundation.

What temperature will a camper freeze at?

How Long Does It Have To Be Below Freezing For RV Pipes To Freeze? It will only take about 24 hours of below-freezing temperatures (lower than 32 degrees Fahrenheit) for the pipes to freeze in your RV.

How many faucets to let drip?

The question of dripping every faucet needs context. You can drip just one if it's further from the water line. If you are unsure where that is, dripping all of them is a good option. It might cost you extra on your water bill, but plumbing repair and damage of a busted pipe in your home could cost even more.

How likely is a frozen pipe to burst?

Although common, frozen pipes do not always burst. However, the ice can increase this risk when it thaws and is usually worsened as it raises pressure further which makes pipe bursting common near winter's end or springtime. Furthermore, the more water flowing through the pipe, the greater chance of rupture.

How low can you set your thermostat before pipes freeze?

Set the thermostat to a temperature no lower than 55° F. Insulate pipes. Pipe insulation can cost pennies per linear foot at your local hardware store or home center.

What temperature to keep a house in winter?

The U.S. government Department of Energy (DOE) states that people should set their thermostats to 68 degrees F. This is the optimal temperature for keeping a home comfortable.

What not to do when your water pipes freeze?

Don't ever try to thaw pipes with a:
  1. Blowtorch.
  2. Gas heater.
  3. Kerosene heater.
  4. Propane heater.
  5. Other open flame appliances.
  6. Any device near insulation.
  7. Electric device with extension cord.
  8. Electric heater, blow dryer, or other device near water.

At what temperature should you leave pipes dripping?

As Jake Romano, plumbing expert at John the Plumber, explains, 'Frozen pipes become a real threat at 20 degrees Fahrenheit (-6.6 degrees Celsius) or lower. ' Therefore, as soon as cold weather hits these temperatures, drip your faucet if it is connected to a pipe.

What temperature is considered freezing?

Frost becomes more widespread when the temperature falls below 32°F with some freeze possible. A hard freeze is possible when temperatures fall below 28°F.

At what outside temperature do house pipes freeze?

What Temperature Will Cause My Pipes to Freeze? Pipes run the risk of freezing at temperatures below 32 degrees Fahrenheit, especially if they're not insulated, but most insulated pipes start to freeze at 20 degrees Fahrenheit or below.

How do I make sure my outside faucets don't freeze?

6 Steps for How to Protect Outdoor Faucets from Freezing
  1. Remove the garden hose from the faucet in the fall. ...
  2. Shut off the upstream water supply valve feeding the outdoor faucet. ...
  3. Drain any residual water from the faucet and pipe. ...
  4. Install an outdoor faucet protector. ...
  5. Insulate the pipe leading up to the faucet.

At what temperature should you shut off water?

During Freezing Weather

If you are away for any length of time shutting off the water can reduce the chance of a broken pipe. Leave the home's heat on to at least 55°. Shut off water to the house and open all faucets to drain pipes; flush the toilets once to drain the tank but not the bowl.

Will pipes naturally unfreeze?

Make sure to keep heaters away from anything potentially flammable! Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing.

Is it better to drip faucets or shut off water?

Overall, it's best that you take heed and drip your faucets when temperatures dip below freezing. A simple trickle of hot and/or cold water—both from faucets inside and outside the home—can prevent you from having to deal with a much larger issue (and bill!) in the long run.

Can washing machine pipes freeze?

Not only are you usually washing more clothes, but cold temperatures can lead to frozen washing machine pipes. Before you let cold weather interrupt your laundry progress, here's how to deal with a frosty washing machine drain and prevent it from freezing again once you finally get it to thaw.

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