Air frosts begin

Yesterday and today the station recorded its first air frosts of the season. (Reminder - an air frost is when the temperature of the air at about 1.5 metres above ground level is below zero; ground frosts are more common and can occur with an above-freezing air temperature since cold air sinks to the ground). Although many people are commenting on "early frosts", they aren't really out of the ordinary. Most years since 2003, the Monifieth station has recorded several air frosts in November, so there's nothing particularly noteworthy here. What continues to be remarkable is that 2010 is still on course to be coldest year on record by quite some margin. Of course this could all be overturned if December turns out to be balmy and mild. Time will tell.