Monthly Climate Summary for  April  2009  at Hampstead  
                        home daily
                Mostly dry and warm;  a dull Easter otherwise long sunny periods   back forward
                       
Overall mean temperature was 11.0 ēC which is +2.6 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 15.2 ēC              
Mean night minimum (21-09) was 6.8 ēC              
Mean 24hr maximum (09-09) was 15.2 ēC which is +2.8 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 6.7 ēC which is +2.3 degC compared with the 1971-2000 average
  Highest day max was 19.9 ēC on  the   21          
  Lowest day max was 9.3 ēC on  the 27          
  Highest night min was 11.1 ēC on  the 16          
  Lowest night min was 2.5 ēC on  the 28          
  Lowest grass min was -1.2 ēC on  the 28          
                       
Total rainfall this month was 23.8 mm which is 42.4 per  cent of the 1971-2000 average  
  Highest daily fall was 5.7 mm on  the 16          
Number of hours with rain was 47.0 hrs              
Equiv. TSR rainfall duration was 32.9 hrs which is 78.3 per  cent of the 1971-2000 average  
  Highest no of wet hrs 11.0 hrs on  the 10          
  Highest equiv duration 9.1 hrs on  the 10          
                       
Total sunshine this month was 159.3 hrs which is 124.7 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 175.3 hrs which is 124.7 per  cent of the 1971-2000 average  
  Highest daily sun was 10.4 hrs on  the 22          
                       
Maximum  snow depth  was 0.0 cm on  the            
                       
Mean sea-level pressure at 09Z 1014.5 mbar which is -0.7 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1028.7 mbar on  the 20          
  Lowest  pressure at 09Z 996.9 mbar on  the 27          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 13   No  sun 3   Snow lying 0  
Grnd Frost 3   1.0mm 6   3h  sun 22   Snow/sleet 0  
Max < 0ēC 0   5mm 1   6h  sun 14   Hail 0  
Max > 10 29   10mm 0   9h  sun 7   Thunder 1  
Max > 20 1   25mm 0   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month: