Jeremy Handscomb wrote in message ...
: ... was wondering what the standard convention is
:if the minimum (or indeed maximum) temperature coincides with the time of
bservations?

Assuming you record one max. and min. temp. for each period of 24 hours, it
counts twice. Your -3°C was the min. temp. for the 24 hours ending 8 a.m.
today and will be the min. temp. for the 24 hours ending 8 a.m. tomorrow -
unless the temperature has fallen/falls below -3°C before 8 a.m.tomorrow.

Colin Youngs
Brussels