Technology

As long as the outside air is below like 80C.. yes it will help.

Hardware runs hot. More air circulation will help in nearly all instances in practice.

Yes, it helps. The parts that are being air cooled are substantially hotter than the ambient air, almost always, do the faster you can circulate air the faster they will cool down, even if it's relatively hot outside for humans.

I know that when my room is just a few degrees C warmer, my CPU runs hotter and the fan runs higher for longer.

Well sure, because the difference between air temp and hardware temp isn’t as great. So it has to move more air to achieve the same cooling.

But it’s still cooling. If your room is usually, say, 20°C, and it’s now 25°C, while that’s hot for us it is still a LOT cooler than the, I dunno, 60°C your CPU is running at.

If your room is hot enough that the CPU cannot cool, you probably wouldn’t want to be in the room, since your body needs to regulate your temperature significantly lower than the CPU (≈37°C or 98.6°F).