Monthly Climate Summary for  April  2009  at Whipsnade (Lodge)
                          home daily
                       Warm and mainly dry;  a dull Easter otherwise long sunny periods     back forward
                         
Overall mean temperature was 9.3 ēC which is +2.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 14.3 ēC which is +3.1 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 4.3 ēC which is +1.1 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 14.4 ēC                
Mean 24hr minimum (09-09) was 4.2 ēC                
  Highest day max was 19.0 ēC on  the   15            
  Lowest day max was 9.7 ēC on  the 11            
  Highest night min was 9.0 ēC on  the 16            
  Lowest night min was -0.6 ēC on  the 29            
  Lowest grass min was -4.0 ēC on  the 29            
                         
Total rainfall this month was 43.9 mm which is 79.8 per  cent of the 1971-2000 average    
  Highest daily fall was 10.7 mm on  the 16            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 50.3 hrs which is   per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 15.0 hrs on  the 10            
  Mean rainfall intensity 0.87 mm/hr                
                         
Total CS sunshine this month was 192.7 hrs which is 138.7 per  cent of the 1971-2000 average    
Equiv. C/S sunshine total was   hrs which is   per  cent of the 1971-2000 average    
  Highest daily sun was 13.4 hrs on  the 29            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1013.9 mbar which is -1.3 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1028.4 mbar on  the 20            
  Lowest  pressure at 09Z 995.5 mbar on  the 27            
                         
Number of days with:                      
Air Frost 2   0.2mm rain 13   No  sun 4   Snow lying 0    
Grnd Frost 12   1.0mm 11   3h  sun 23   Snow/sleet 0    
Max < 0ēC 0   5mm 4   6h  sun 15   Hail 0    
Max > 10 28   10mm 1   9h  sun 11   Thunder 0    
Max > 20 0   25mm 0   12h sun 5   Fog at 09Z 6    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: