I got no numbers on temps, but I took a ride on Sat, 25mi of dirt from 1000' to ~4200' in the SA's and it was the coldest ride ever! There was frost the whole ride in those N face cold dark hollers, and every puddle was iced. We were riding fire road side by and came up on a big puddle across the whole road on a downhill, I ducked a little L and hit the narrow muddy path leavin ADawg the whole R puddle. He hit it at speed, popped up and landed in the center with a split second of "is this going to grip, slide out, or break through?" He broke through just as I cleared the mud and it sounded like a car wreck right next to me the way he broke the ice. Singletrack was perfect, with a lot of crunchy forzen conditions. The sun was warming, but all the shade needed a fleece if you hung out for long, not to mention the sweaty gloves freezing.
Things are greening up, but there isn't a lot of running water. We need more rain in SoCal. Cold = Dry.
I used to be with it, then they changed what it was. Now what I'm with, isn't it, and what's it seems weird and scary to me. It'll happen to yoooouuu.