Last night it was -4 Celcius when I went out at 21:30 to collect Boy the Younger from an after-school activity he'd ridden to.
I was on the fixed and he on his (hand-me-down) MTB.
As we diced with death along the tarmac of our town, I heard myself say "Watch out for the bits with a dull sheen, watch out for the wet-looking bits and watch out for the icy bits!"
It was jolly, jolly cold. I don't think I'd want to go further than a mile or two in those conditions now that I no longer bounce so well.