Monthly Climate Summary for August 2009 at Hampstead  
                        home daily
                                           Rather warm with long dry periods   back forward
                       
Overall mean temperature was 18.0 ēC which is +0.8 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 22.2 ēC              
Mean night minimum (21-09) was 13.8 ēC              
Mean 24hr maximum (09-09) was 22.2 ēC which is +0.4 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 13.8 ēC which is +1.2 degC compared with the 1971-2000 average
  Highest day max was 27.5 ēC on  the   19          
  Lowest day max was 18.2 ēC on  the 30          
  Highest night min was 16.9 ēC on  the 5          
  Lowest night min was 8.5 ēC on  the 29          
  Lowest grass min was 6.3 ēC on  the 3          
                       
Total rainfall this month was 55.4 mm which is 89.4 per  cent of the 1971-2000 average  
  Highest daily fall was 45.3 mm on  the 6          
Number of hours with rain was 38.0 hrs              
Equiv. TSR rainfall duration was 26.6 hrs which is 78.2 per  cent of the 1971-2000 average  
  Highest no of wet hrs 10.0 hrs on  the 6          
  Highest equiv duration 8.3 hrs on  the 6          
Mean rainfall intensity 2.08 mm/h              
                       
Total sunshine this month was 152.7 hrs which is 88.8 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 167.9 hrs which is 88.8 per  cent of the 1971-2000 average  
  Highest daily sun was 10.1 hrs on  the 19          
                       
Maximum  snow depth  was 0.0 cm on the            
                       
Mean sea-level pressure at 09Z 1017.4 mbar which is +1.1 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1024.9 mbar on  the 22          
  Lowest  pressure at 09Z 1007.5 mbar on  the 24          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 9   No  sun 0   Snow lying 0  
Grnd Frost 0   1.0mm 4   3h  sun 24   Snow/sleet 0  
Max < 0ēC 0   5mm 1   6h  sun 11   Hail 0  
Max > 10 31   10mm 1   9h  sun 2   Thunder 0  
Max > 20 26   25mm 1   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month: