24-hr Average Temperature

      JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
LHR   4.9  4.6  7.1  9.0 12.6 15.6 18.4 17.8 15.2 12.0  7.7  6.1
JFK  -0.4  0.5  5.0 10.2 15.5 20.7 24.1 23.7 19.7 13.8  8.4  2.5
LAX  13.7 14.2 14.4 15.6 17.0 18.7 20.6 21.3 21.0 19.3 16.4 13.8
FCO   7.2  8.3 10.5 13.7 17.8 21.7 24.4 24.1 20.9 16.6 11.7  8.4
SYD  22.1 22.0 20.9 18.3 15.2 12.8 11.8 13.0 15.2 17.6 19.4 21.2

FCO  Leonardo da Vinci International (Fiumicino), Rome, Italy
JFK  John F Kennedy Airport, New York, USA
LAX  Los Angeles International Airport, Los Angeles, USA
LHR  Heathrow Airport, London, UK
SYD  Kingsford Smith, Sydney, Australia