Monthly Climate Summary for September 2011 at Whipsnade (The Lodge)
                          home daily
                    A rather dull, changeable month, redeemed by a brilliant finish       back forward
                         
Overall mean temperature was 14.9 ēC which is 1.6 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 19.2 ēC which is 2.0 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 10.5 ēC which is 1.2 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 19.2 ēC                
Mean 24hr minimum (09-09) was 10.4 ēC                
  Highest day max was 26.0 ēC on  the   30            
  Lowest day max was 15.5 ēC on  the 7            
  Highest night min was 15.1 ēC on  the 10            
  Lowest night min was 3.8 ēC on  the 15            
  Lowest grass min was -0.5 ēC on  the 15            
                         
Total rainfall this month was 57.3 mm which is 100.5 per  cent of the 1971-2000 average    
  Highest daily fall was 24.2 mm on  the 4            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 29.6 hrs which is   per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 7.0 hrs on  the 20            
  Mean rainfall intensity 1.94 mm/hr                
                         
Total CS sunshine this month was 172.5 hrs which is 126.4 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 11.1 hrs on  the 1            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1013.8 mbar which is -2.6 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1029.5 mbar on  the 27            
  Lowest  pressure at 09Z 999.6 mbar on  the 12            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 13   No  sun 1   Snow lying 0    
Grnd Frost 1   1.0mm 9   3h  sun 22   Snow/sleet 0    
Max < 0ēC 0   5mm 4   6h  sun 16   Hail 0    
Max > 10 30   10mm 1   9h  sun 6   Thunder 0    
Max > 20 9   25mm 0   12h sun 0   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: