Forecast temps too high in this cold snap

I know we are experiencing very cold weather right now but even WXSim is unable to cope. My forecasts for today and into the weekend are way too high. Today WXSim is saying 3 and right now it is -2, Sunday it says 9 and UKMO suggest 5 or 6. I am a little surprised by this as normally my predicted temps are much better in line with UKMO.

Stuart

I am experiencing the same, currently forecasting 8c on Saturday and 12c on Sunday for Sussex coast. This morning’s run indicated 10c for tomorrow but tonight’s run was more sensible at 0c for tomorrow