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What Temperature Should You Set The Air Conditioner in Summer?

Keeping your home cool and super comfortable can be an arduous task, given the fact that the heat in the summer is increasing year by year. One might think getting an air conditioning unit can do the job, but there are some effects to that too. If you are using an air conditioner, which is necessary, it can surge your power bills significantly.

However, it is not the case if you keep some things in mind. One of those crucial things to keep in mind while using the air conditioner in summer is the temperature. There is an ideal temperature at which you can set your AC to get the required cooling while saving energy.

What is the Ideal AC Temperature for Summer?

Well, the prime thing to bear in your mind is that there is a perfect temperature at which you can set your thermostat during the summer months. However, you cannot keep it at the same temperature during the day and night.

The temperature has to vary. If we talk about the temperature during the day, the general rule is to keep a difference of -6.6 degrees celcius between the indoor and outdoor temperatures. This should be done to ensure that if you have to go outdoors, the temperature difference is easily bearable by the body.

Best Temperature for Day!

The best temperature to run your AC during the day is 27 to 29 degrees celsius. If you run your AC between or at these temperatures for eight hours, you can easily save 5-15% on the overall cooling cost.

Though this is an ideal setting for the AC temperature, the required AC temperature can vary a little based on various factors. These factors are the location of your house, the insulation of your house, the time of the day, etc. In areas like in London, the ideal AC temperature is between 21 to 25 degrees celsius.

Best Temperature for Night!

When it comes to nighttime, the temperature outdoors drops during the night, which is why you need to lower the AC temperature. The ideal temperature to set your AC to at night is 15 and 19 degrees celsius. It is better to use sleep mode on your AC as it will turn OFF the AC after some time, saving you money.

Can I Automate the Temperature Settings of the Air Conditioner?

If you are a working-class person, it can be a bit inconvenient to turn the AC ON and OFF repeatedly. Moreover, keeping track of the temperature and adjusting it after coming from work can be irritating. This is where the need for automation or a programmable thermostat comes into the picture.

A programmable thermostat is an excellent device that can help keep your home at the right temperature while you are away. For example, if you are out, it will keep the temperature higher and reduce it to your set value when you are ready to come home. The device can be a great way to save more power.

Essential Tips to Obtain the Best Out of Your AC in Summers!

Ok, now we know what the ideal temperature for your AC for this summer is. But, it is not going to be enough. You will reap no benefits from setting the AC at 25 or 26 degrees celsius if you haven’t taken care of the other factors.

So, here are some tips that you need to implement to get the best air conditioning installation this summer.

Use a ceiling fan: Using an AC is not going to be enough if you want to cool in multiple rooms. Cool air is heavy, which is why it accumulates wherever it is released. Therefore, it is necessary to have a ceiling fan that circulates the air. This will significantly affect your power bill.

Keep the doors and windows closed: Your AC will not deliver performance if you leave the doors & windows open. You see, the AC captures the hot air in the room, cools it, and releases it back into the house. Hence, if the hot air outside is coming inside, the overall cooling effect will be hampered.

Keep a check on the air filters: No matter what temperature your AC is set to, if the filters used in the AC are not clean, your AC will require more power to suck the air in and deliver cold air out. Hence, if your AC has removable filters, take them out and clean them on a regular basis.

Keep all these things in mind, and you will never face high power bills due to your AC, at least.


In a nutshell, it is entirely safe to say that you can get the required cooling in the summer while keeping your power bills down. Most importantly, there is an ideal temperature at which you can run your AC to use it in the most efficient way.

To get the best out of your AC, Get in Touch with Hamilton Air Con.

Matthew Connery
By: Matthew Connery

Matthew Connery is the Director of Hamilton Air Conditioning in London. He is a skilled Business Strategist who delivers energy-efficient and cost-saving solutions to commercial and domestic clients from leading air conditioning brands. 

Jan 25 2023