Monthly Climate Summary for July 2004 at Hampstead    
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             Very cool until the 13th then consistently rather warm; generally cloudy.   back forward
                       
Overall mean temperature was 17.2 ēC which is -0.1 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 22.0 ēC              
Mean night minimum (21-09) was 12.5 ēC              
Mean 24hr maximum (09-09) was 22.0 ēC which is +0.0 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 12.5 ēC which is -0.2 degC compared with the 1971-2000 average
  Highest day max was 28.6 ēC on  the   29          
  Lowest day max was 16.9 ēC on  the 12          
  Highest night min was 16.5 ēC on  the 30          
  Lowest night min was 9.0 ēC on  the 10          
  Lowest grass min was 1.6 ēC on  the 5          
                       
Total rainfall this month was 51.3 mm which is 109.1 per  cent of the 1971-2000 average  
  Highest daily fall was 19.4 mm on  the 7          
Number of hours with rain was 45.0 hrs              
Equiv. TSR rainfall duration was 31.5 hrs which is 112.5 per  cent of the 1971-2000 average  
  Highest no of wet hrs 10.0 hrs on  the 7          
  Highest equiv duration 8.3 hrs on  the 7          
                       
Total sunshine this month was 158.3 hrs which is 90.2 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 174.1 hrs which is 90.2 per  cent of the 1971-2000 average  
  Highest daily sun was 12.0 hrs on  the 23          
                       
Maximum  snow depth  was 0.0 cm              
                       
Mean sea-level pressure at 09Z 1017.3 mbar which is -0.1 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1027.7 mbar on  the 24          
  Lowest  pressure at 09Z 1006.4 mbar on  the 8          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 12   No  sun 0   Snow lying 0  
Grnd Frost 0   1.0mm 8   3h  sun 22   Snow/sleet 0  
Max < 0ēC 0   5mm 3   6h  sun 12   Hail 0  
Max > 10 31   10mm 2   9h  sun 4   Thunder 2  
Max > 20 22   25mm 0   12h sun 1   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month:                  
Temperature exceeded 22ēC on only one day during 1st-14th, but on 14 out 17 days from the 15th-31st      
Overall, it was the coolest and cloudiest July since 2000              
Only 3.9mm of rain fell after mid-month