Monthly Climate Summary for July 2006 at Hampstead  
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Hottest July on record; several thundery days   back forward
                       
Overall mean temperature was 21.4 C which is +4.1 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 27.1 C              
Mean night minimum (21-09) was 15.7 C              
Mean 24hr maximum (09-09) was 27.1 C which is +5.1 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 15.7 C which is +3.0 degC compared with the 1971-2000 average
  Highest day max was 34.4 C on the 19          
  Lowest day max was 20.4 C on the 7          
  Highest night min was 20.0 C on the 27          
  Lowest night min was 10.6 C on the 14          
  Lowest grass min was 1.1 C on the 14          
                       
Total rainfall this month was 42.5 mm which is 90.3 per cent of the 1971-2000 average  
  Highest daily fall was 23.8 mm on the 5          
Number of hours with rain was 30.0 hrs              
Equiv. TSR rainfall duration was 21.0 hrs which is 75.0 per cent of the 1971-2000 average  
  Highest no of wet hrs 7.0 hrs on the 5          
  Highest equiv duration 5.8 hrs on the 5          
Mean rainfall intensity 2.02 mm/h              
                       
Total sunshine this month was 249.9 hrs which is 142.4 per cent of the 1971-2000 average  
Equiv. C/S sunshine total was 274.9 hrs which is 142.4 per cent of the 1971-2000 average  
  Highest daily sun was 12.7 hrs on the 1          
                       
Maximum snow depth was 0.0 cm on the            
                       
Mean sea-level pressure at 09Z 1020.5 mbar which is +3.1 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1033.2 mbar on the 14          
  Lowest pressure at 09Z 1010.6 mbar on the 9          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 9   No sun 0   Snow lying 0  
Grnd Frost 0   1.0mm 8   3h sun 29   Snow/sleet 0  
Max < 0C 0   5mm 1   6h sun 20   Hail 0  
Max > 10 31   10mm 1   9h sun 16   Thunder 6  
Max > 20 31   25mm 0   12h sun 5   Fog at 09Z 0  
Max > 30 9         15h sun 0   Gale 0  
                       
Notable events during the month:                
Warmest July since records began in Dec 1909, and warmest of any calendar month        
Max of 34.4C on the 19th was the highest for any July day, and the lowest max of 20.4C was also a new (high) record