What temprature would make you weak more than a T?

[Frozen]

For me, if it's rainy and windy, +6c, if it's sunny, up to freezing.

[Atlas]

It's currently 5°C here. I don't wear a shirt. I wear a shirt when it's above 20°C.

[Frozen]

+6c Here, but with rain and wind...my kind of weather :> ...

[Immortal Technique]

Im never cold.

[armenianbodyhair]

You missed a crucial category there...15-10 for me.

[alfieb]

I almost always wear t-shirts and/or wifebeaters. I don't like long-sleeved shirts and only wear them when required in a professional setting, or at a function where I need to dress up.

If I'm cold, I'll put a coat on, on top of my t-shirt.

There are a few occasions (like in my avatar) where I wear a hoodie, but it's usually only in the winter.

[portusaus]

10-5c. When I was younger morelike <5c.

[Brighton]

<10c I'd say.. I've worn t-shirts with 5 to 10c if it's sunny though.