Monthly Climate Summary for September 2007  at Hampstead
                        home daily
               Very dry, especially up to the 22nd;  variable sunshine and temperatures   back forward
                       
Overall mean temperature was 14.8 ēC which is +0.5 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 19.0 ēC              
Mean night minimum (21-09) was 10.7 ēC              
Mean 24hr maximum (09-09) was 19.0 ēC which is +0.7 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 10.7 ēC which is +0.3 degC compared with the 1971-2000 average
  Highest day max was 24.0 ēC on  the   5          
  Lowest day max was 12.9 ēC on  the 26          
  Highest night min was 15.6 ēC on  the 7          
  Lowest night min was 5.4 ēC on  the 18          
  Lowest grass min was 2.7 ēC on  the 30          
                       
Total rainfall this month was 18.0 mm which is 27.3 per  cent of the 1971-2000 average  
  Highest daily fall was 7.5 mm on  the 23          
Number of hours with rain was 25.0 hrs              
Equiv. TSR rainfall duration was 17.5 hrs which is 47.3 per  cent of the 1971-2000 average  
  Highest no of wet hrs 8.0 hrs on  the 28          
  Highest equiv duration 6.6 hrs on  the 28          
Mean Rainfall Intensity 1.03 mm/h              
                       
Total sunshine this month was 130.6 hrs which is 100.0 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 143.6 hrs which is 100.0 per  cent of the 1971-2000 average  
  Highest daily sun was 9.2 hrs on  the 11          
                       
Maximum  snow depth  was 0.0 cm              
                       
Mean sea-level pressure at 09Z 1022.2 mbar which is +5.5 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1032.9 mbar on  the 7          
  Lowest  pressure at 09Z 1006.8 mbar on  the 24          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 8   No  sun 0   Snow lying 0  
Grnd Frost 0   1.0mm 4   3h  sun 22   Snow/sleet 0  
Max < 0ēC 0   5mm 2   6h  sun 8   Hail 0  
Max > 10 30   10mm 0   9h  sun 1   Thunder 0  
Max > 20 14   25mm 0   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month: