What is the lowest temperature you should keep your house at?

Author: Dr. Cecil Bailey  |  Last update: Thursday, November 27, 2025

Recommended Temperature When the Home is Vacant For short periods of time away, like going to work, we'd recommend a temperature of around 55 – 60 degrees (F). While away on long periods of time, such as vacation, we don't recommend setting the temperature any lower than 50 degrees (F).

What temperature is too cold for a house?

When deciding what temperature to set your thermostat to, avoid going below 63 degrees. Temperatures below 63 degrees Fahrenheit can cause mold and mildew growth or increase allergens.

What is the best temperature to leave an empty house in winter?

When leaving an empty house in winter, it's important to maintain a temperature that prevents pipes from freezing and protects the home's structure. A common recommendation is to set the thermostat between 55°F to 60°F (13°C to 16°C). Here are some additional tips:

What is the lowest temperature house before pipes freeze?

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. So, your best bet is to insulate your exposed pipes to keep that temperature well above the freezing point.

Will pipes freeze if house is 70 degrees?

When temperatures approach zero, wind can penetrate through a small opening and can freeze nearby pipes, even thought the room temperature is 70 degrees! Insulate pipes in unheated garages and crawl spaces.

What Temperature Should I Keep My Home During the Winter & Summer

What's the lowest you should set your thermostat?

What's The Lowest Temperature I Can Set My Thermostat in Winter? Do you just love the cold so much you'd rather not run any heat in winter? The winter thermostat setting should at minimum be between 50-55 degrees to keep your appliances and pipes from freezing.

How warm should you keep your house in extreme cold?

When the temperature actually drops, here are a few more steps to take. Keep your house heated to a minimum of 65 degrees. The temperature inside the walls where the pipes are located is substantially colder than the walls themselves. A temperature lower than 65 degrees might not keep the inside walls from freezing.

What is the cheapest temperature to keep your house in winter?

To save money, aim to have your temperature set around 68-72 degrees Fahrenheit when you're at home and awake. This is a comfortable temperature for most with the help of a light sweater. Overnight and when you're out, around 64 degrees Fahrenheit will keep your home at a good temperature.

What temperature to set a thermostat to prevent freezing?

Regardless of how long you will be traveling and away from home, keep your thermostat set at 68 degrees Fahrenheit or above. This will help to keep the pipes on the inside of the home from freezing and the ones under the home at a slightly higher temperature as well.

What is an unhealthy house temperature?

The World Health Organization recommends a thermostat setting no lower than 68 degrees while you're home. If you have children or seniors in your house, that number increases to at least 70 degrees. If your house is too cold, it can cause problems with blood pressure and circulation, as well as affect your heart rate.

Why does my house feel cold at 73?

If you're cold even though your thermostat indicates you shouldn't be, your furnace likely isn't the problem. In most cases, it's working just fine. It's your home that needs attention. Lack of insulation, severe air leakage, and/or unbalanced ductwork are frequently to blame.

What's the coldest you should let your house get?

The World Health Organization (WHO) recommends setting your thermostat no lower than 64 degrees (F) in the Winter months while people are in the home. If there are infants or elderly individuals, they recommend keeping the temperature at 70 degrees at a minimum.

What temperature to keep a house to prevent mold?

Keeping the air conditioner set at 78 degrees or lower prevents mold buildup in the summer. Even when leaving for a few days or vacation, don't set it above 80. A higher setting won't provide enough dehumidification from the cooling process to prevent spores from growing.

What temp should my house be if it's 100 outside?

During heat waves, experts, including utility companies, recommend keeping your thermostat no more than 20 degrees cooler than the outdoor temperature. For instance, if it's 100 degrees outside, aim to set your thermostat to at least 80 degrees.

Is 65 too cold for a house?

The World Health Organization recommends keeping indoor temperatures between 64 and 75 degrees Fahrenheit for healthy people. The minimum temperature should be kept above 68 degrees Fahrenheit to protect the very young, the elderly, or people with health problems. Watch out for signs of hypothermia.

What is the best temperature to keep your electric bill down?

In the winter, set your thermostat to 68 degrees or the lowest comfortable temperature. In warmer months, set it to 78 degrees or higher. It's a no-cost option to reduce energy expenses. At night or when you're going to be away from home for an extended period, adjust the thermostat a few more degrees.

What's the lowest temp you should keep your house when away?

When preparing your home for winter if you plan to be away, the best thermostat settings are between 55 and 60°F. If your winters are mild and freezing pipes are not as much of a concern, you can go lower to 45°F to potentially save money.

How low can you set your AC before it freezes?

A common rule of thumb is that most models can function properly only above 68 degrees Fahrenheit. Any lower temperature will result in the system freezing up. In addition to a frosty refrigerant, the piping and coils could also become covered with ice.

What is the lowest you can set your thermostat in the summer?

When you get home, the most energy efficient thermostat setting for summer is around 72-76°. Don't drop the temperature lower than that, expecting the house to cool off faster.

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.

How low is too low for a thermostat in winter?

Tips To Avoid Frozen Water Pipes

Leave your thermostat setting no lower than 60° F if you plan to be away from home in winter—keep it higher if temperatures are forecasted to be especially frigid when your home is vacant. Have a neighbor or friend check your house when you're away to head off problems.

Is it cheaper to leave your thermostat at one temperature?

Keeping your home at a constant temperature generally means that your HVAC system will run constantly to meet it. This means that your furnace or air conditioner may run when you're asleep, at work, or out of the house. This wastes more energy than the minimal amount that you might save by having it constantly run.

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