Fog all day at Plas Huws and a max temp of -1°C. An odd phenomenon and the reverse of what is usually seen is that the hoar frost (possibly rime) deposit is confined to the tops of hedges and bushes and there's none on the grass or on my car. I put this down to heat from the ground. Nothing else would seem to explain it. (Jakutsk update) They still have fog, as they have had since before the New Year. The temperature is about -46°C and goes up and down a degree or two independently of time of day but more in response (probably) to the presence or absence of high cloud, which you can't see anyway ("sky obscured"). The sun does its best but at this time of year 4 degrees from the Arctic Circle it may as well not bother. No wind to speak of; they're probably breathing the same shitty air they were at Christmas.
Out in the sticks here in Berkshire, I don't think we got above -2C, and didn't witness any of the sunny spells suggested by the BBC's local weather site; just a mid-grey blanket of cloud all day.