I've been getting similar from temperature (also Aussie ).
I find that in my house I'm fine as we have a good heater and if off I have a great Doona I can get under, but when at some mate's places with no heating, or when working, the colder temps can make my hands go numb quite fast.
Fingerless gloves have always seemed to work for me unless it gets noticeably below 0 degrees.

One bit of advice on gloves I can give is that leather fingerless gloves will give you more accurate usage of your fingers, but woolen ones are generally a bit warmer.