Mac Studio M1 Max temperature

What macOS version is the Mac Studio running?

Monterey or Ventura

As a test, disable Computer Sleep and only allow the Display(s) to turn off.

Then test that configuration 24-7 or Shutdown at the end of each work day.

You might try Stats, an app that monitors/displays temperatures (and other information) to see what your temperatures are when you have concern.

Stats resides in the menu bar, is free, open-source, and available here.

Although I don't recall having touched my Studio in the morning, whenever I've done so during the day it has been quite cool to the touch.

Well, I also have a Mac Studio Mac Max with 2TB storage and 32GB memory. It stays very cool to the touch no matter what time of the day, no matter what is going on, idle, working. It NEVER heats up. I have a little app called Mac Fan Control and the free version allows you to monitor the fan speed. My Mac Studio’s fan is always on and always near the minimum speed. I’m thinking something isn’t right if your Mac Studio is heating up for no reason.

I set my displays to turn off after xx minutes, that's the only way to do it short of unplugging them from power.

FYI, this morning when I sat down to it, my Studio M1 Max had a highest CPU core temperature of 32ºC, fan speed just over 1300.

Look at Energy Saver in System Preferences (for Monterey, at least -- I understand it's been changed for Ventura).

Eric To wrote:

The LG UltraFine 5K monitor has no power off/on button. So, how I should turn the display off?

You set the Energy Saver to Allow the Display to Turn Off after 10 or 15 minutes.