Aah, have you seen my legs? Most often I and the boys do wear shorts over thermals but have to be real men when in deep snow.
Despite the sun, at the altitude we are at for tahr any wind is very cold and as the sun sets the cold really gets into the bones when sitting around having a meal or a cold one. Down jackets are a must with an outer over top too.
At least with a chopper in and out weight is not normally an issue so you can take really good clothing and sleeping equipment, we even take small water bottles to fill with the hot water after boiling spuds etc., and chuck these in the sleeping bag to get things cosy.
I good warm nights sleep sets you up well for the next day. Of course a hut with fire and toilets etc. is bliss but mostly they are full up during the winter tahr hunts plus I snore badly so my boys won't allow me in a hut now