You’ll get the best balance of comfort, health, and energy savings by setting your air conditioner a bit higher than most people instinctively do and adjusting around that point rather than chasing “ice-cold” air.

Ideal summer AC temperature (quick answer)

  • For most homes, a good starting point is:
    • 78°F (about 26°C) when you’re at home and awake.
* A little higher (80–82°F / 27–28°C) when you’re **asleep or away** , if you tolerate it.
  • Many energy and HVAC experts repeat this same guidance because:
    • It saves electricity and lowers bills.
    • It reduces strain on the grid during heat waves.
    • It’s usually still comfortable if humidity is controlled and fans are used.

If 78°F feels too warm, try 76°F first rather than jumping straight down to 72°F; every degree lower costs you more over the summer.

Common ranges people actually use

In practice, people don’t all use the same number—there’s a comfort “band” most households fall into:

  • Typical summer settings: around 75–78°F (24–26°C) for comfort + efficiency.
  • Cooler preference: some like 72–74°F (22–23°C) , but this can noticeably raise energy use.
  • Energy-focused: some guides recommend 25–27°C (77–81°F) as an ideal summer range, especially in places with high energy prices or milder climates.

Think of it this way: start near 78°F / 26°C, then nudge up or down 1°F at a time until the room feels “comfortably neutral,” not cold.

How to adjust for your situation

Here’s how you can fine-tune the setting rather than chasing a single “perfect” number:

  1. Climate & humidity
    • In humid areas, 76–78°F can feel fine if your AC dehumidifies well and you use fans.
 * If your home feels “sticky” even at 75–76°F, the issue may be humidity or poor airflow, not just temperature.
  1. When you’re home vs away
    • Home and awake: aim for 76–78°F.
 * Sleeping: you can either keep the same temperature or raise it slightly and use a fan and lighter bedding.

 * Away for work or errands: raise it to **80–85°F (27–29°C)** if pets and belongings are safe at that level; this can cut cooling costs over the season.
  1. Health, age, and comfort
    • Elderly, infants, or people with heart/respiratory conditions may need it a bit cooler and more stable; don’t push temperatures too high in extreme heat.
    • If anyone is feeling dizzy, overheated, or unwell in a heat wave, comfort and safety matter more than saving a few dollars.

Tips to feel cooler without lowering the thermostat

To stay comfortable at 76–78°F instead of cranking it down to 70–72°F:

  • Use ceiling or pedestal fans to boost the “wind chill” effect; moving air can make a 78°F room feel several degrees cooler.
  • Close blinds or curtains on sunny windows during the day to reduce heat gain.
  • Seal obvious air leaks around doors and windows so cool air isn’t escaping.
  • Clean or replace AC filters regularly so the system can actually move enough air and dehumidify properly.

A simple real-life strategy:

Set the thermostat to 78°F, turn on a fan in the room you’re using, wait 30–60 minutes, and only then decide if you truly need to drop it a degree.

Bottom line

  • A solid answer to “what temperature should I set my air conditioner in summer?” is:
    Around 78°F (26°C) when you’re home, a bit higher when you’re away, and adjust by 1°F steps for your comfort.

Information gathered from public forums or data available on the internet and portrayed here.