Monthly Climate Summary for  April  2010  at Hampstead  
                        home daily
       Changeable early and late, but dry and sunny with frequent warm days 8th-24th   back forward
                       
Overall mean temperature was 10.0 ēC which is +1.6 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 14.8 ēC              
Mean night minimum (21-09) was 5.1 ēC              
Mean 24hr maximum (09-09) was 14.9 ēC which is +2.5 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 5.1 ēC which is +0.7 degC compared with the 1971-2000 average
  Highest day max was 20.6 ēC on  the   28          
  Lowest day max was 8.5 ēC on  the 1          
  Highest night min was 10.5 ēC on  the 29          
  Lowest night min was 0.7 ēC on  the 1          
  Lowest grass min was -4.9 ēC on  the 17          
                       
Total rainfall this month was 24.6 mm which is 44.0 per  cent of the 1971-2000 average  
  Highest daily fall was 7.9 mm on  the 30          
Number of hours with rain was 40.0 hrs              
Equiv. TSR rainfall duration was 28.0 hrs which is 66.7 per  cent of the 1971-2000 average  
  Highest no of wet hrs 8.0 hrs on  the 2          
  Highest equiv duration 6.6 hrs on  the 2          
                       
Total sunshine this month was 190.1 hrs which is 148.7 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 209.1 hrs which is 148.7 per  cent of the 1971-2000 average  
  Highest daily sun was 10.9 hrs on  the 18          
                       
Maximum  snow depth  was 0.0 cm on  the            
                       
Mean sea-level pressure at 09Z 1020.6 mbar which is +5.4 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1035.0 mbar on  the 10          
  Lowest  pressure at 09Z 1001.9 mbar on  the 3          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 9   No  sun 0   Snow lying 0  
Grnd Frost 13   1.0mm 7   3h  sun 24   Snow/sleet 0  
Max < 0ēC 0   5mm 2   6h  sun 16   Hail 0  
Max > 10 29   10mm 0   9h  sun 11   Thunder 0  
Max > 20 3   25mm 0   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month: