"Phil Layton" wrote in message
...


Tony,
I have known ice (ground frost) with an air minimum of above 3c, but not
above 4c so you are at the high end!

It depends on radiation loss, humidity and wind etc as you probably know.

Phil


Thanks Phil,

That's interesting, it's always been something that has puzzled me! I see
that dewpoints have been on the low side today and yesterday evening. My
location is suburban Newbury, Berkshire so not a million miles from
yourself. Another cold one on the cards tonight, it would seem

Thanks again.

Tony