Those figures for Bracknell would actually have been for Easthampstead
(Beaufort Park), a veritable frost hollow, Graham. Their mins on a radiation
night were typically up to 2.5C lower than in Wokingham Emmbrook. There used
to be another station not far from Easthampstead, in 1904 to 1921, called
Wokingham Sanatorium, and those mins and frost figures were very similar to
Easthampstead, due in no small part to the sandy nature of the soil there.
--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Graham P Davis" wrote in message
...
Bernard Burton wrote:
Air min 4.5C here in Wokingham, grass min +0.3C. Just out of interest
there
were 13 ground frosts here in September 1986, yet remarkably that year
there
was no air frost until 6th December.


In Bracknell in September 1986 we had 15 ground frosts and 7 air frosts.
Four of the air frosts occurred in the first half of the month. As a
caveat, I ought to mention that these figures are based on the figures I
saw in the Met Office entrance hall at the end of the month, and that
they may have been modified since.

Graham