Hi Ant,
The low lying areas in a stable environment tend to get cold earlier due to cold air drainage.
Incedently, it seems there would have been one of the first frosts this morning in the low lying areas where I live.
Regards,
Jimmy Deguara
I thought so since even now it is closing in on 5 AHH and this morning there was frost in my area but up the street there was none was strange haha