It's difficult to stop her moaning sometimes. I've tried the following:
Advise her to wear more layers.
Got her a set of omnipole gloves (for her birthday in September 2005).
Make her wear a woolly hat.
Make the right sympathetic noises, like, 'Ah, well, never mind - not long now, only four hours and loads of houses to go'. Or, 'Only four months till spring, hang in there'.
If all else fails, tell her to stop whinging and work harder.
The last one works the best and really 'warms her up' if you know what I mean. Tell her there's loads of women who work out in the cold (posties, coppers, traffic wardens, etc) and you don't see them moaning.