No No No. Areas of low and high pressure are relative to their
surroundings. Pressure is not low just because it is below the 1015 mb
average for the area. For instance a large deep low may form a
depression on its outer edges which has a pressure of more than 1015mb.
It is still low as it is lower than the surrounding area.

wrote:
Have to say I'm surprised at this warm, sunny spell yesterday and
today. The charts showed lower-than-average pressure in the 1010-15
range, so I wasn't expecting particularly good weather. It means that
(once again) the first week of September has been fine - think we have
to go back to 2000 to find something otherwise.

I guess, rather like those days when pressure is high but upper-level
features cause unexpected cool, showery weather (July 31, August 1)
some upper level feature is compensating for the apparently lowish
pressure on the ground?

Nick