What's the best time to do laundry in the summer?

[XemaSab]

We've got a washer and dryer in the attached garage but they're not vented so when they're running the garage gets warm. (Venting them would require tearing up the floor and moving water to the outside wall. We're a little short on cash now, so this is not a priority.)

In the summer the uninsulated garage is warm anyways, but usually not as warm as it is outside. (To put it in perspective, it's 90 today, and it could be 100 next week. It often cools off at night, but in the summer it's almost never cool enough to have the AC off.)

There's a side door that can be opened to cut down on the humidity, but that runs the risk of letting in even warmer air.

So is the best time to do laundry 1) early in the morning while the air is still cool, 2) DAMN THE TORPEDOES! MIDDLE OF THE DAY!, 3) in the early evening so you're hopefully not adding too much extra heat to the house, or 4) late night while the temperature is still falling.

And does it make more sense to have the door open or closed for any of these scenarios, especially given that opening the door will not make it cooler, but will make it less humid?

(Yes, I know we should line dry things, but I am lazy and I know it won't get done in a timely manner.)

(Also, this exact scenario with the laundry is why we have an oven on the back porch like a bunch of hillbillies.)