The winter problem can easily be solved with proper clothing. There are lightweight rain trousers you can wear above your normal clothes when it rains or snows, and of course a jacket with good ventilation.

The summers are more or less solved with e-bikes: you spend less energy paddling, while still profiting from airflow. I hear France has a subsidy for them. Unless you're in Spain or Southern Italy I guess, or there's a heatwave going on.

Ah, the proper clothing with rain and snow flakes into your face, and then hoping to the bathroom closet as changing room replacement.

This is where picking a bike that suits your climate/circumstances come in.

I commute on a bike (at least, if I'm not going out after work) in London. I have a foldable Brompton bike fitted with an e-bike conversion kit from Swytch. I can ride in the middle of summer (ok, maybe not in those 40C days we just had) and arrive with no sweat. And if it rains, no matter, I stop, fold up my bike and jump on the Tube, or a bus.

Except when there is no tube or bus to hop on.

but then your date is also sweaty, and both of you are in good shape!

And if one of the people turns out to be a creepy perv, the other one can leave without having to depend on them for a ride home in their car.