It's pretty hot here too and I find the wool clings to my little finger and can mess up the tension.
I love old Aero needles and have a couple of duplicate sets which I wrap in a plastic bag and put in the 'fridge. That way, when things get 'clingy' with ye knittin' I just switch them over for the chilled ones.
I haven't thought of putting my knittin in the freezer - knowing me though, I'd be daft enough to put the needles in as well. Ouch!!
Hope it helps