Monthly Climate Summary for December 2011 at Whipsnade (Lodge)
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                     An unsettled and rather windy month; rather cold third week then much milder     back forward
                         
Overall mean temperature was 5.1 ēC which is +1.2 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 7.2 ēC which is +1.0 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 3.0 ēC which is +1.5 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 7.7 ēC                
Mean 24hr minimum (09-09) was 2.1 ēC                
  Highest day max was 11.5 ēC on  the   26            
  Lowest day max was 2.0 ēC on  the 16            
  Highest night min was 10.0 ēC on  the 26            
  Lowest night min was -5.0 ēC on  the 19            
  Lowest grass min was -11.2 ēC on  the 19            
                         
Total rainfall this month was 78.5 mm which is 110.6 per  cent of the 1971-2000 average    
  Highest daily fall was 15.2 mm on  the 12            
Number of hours with rain was                    
               TSR rainfall duration was 80.4 hrs which is   per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 12.5 hrs on  the              
  Mean rainfall intensity 0.98 mm/hr                
                         
Total CS sunshine this month was 56.7 hrs which is 116.9 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 6.7 hrs on  the 7            
                         
Maximum  snow depth  was 6.0 cm on  the  16            
                         
Mean sea-level pressure at 09Z 1012.3 mbar which is -2.3 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1034.5 mbar on  the 27            
  Lowest  pressure at 09Z 985.0 mbar on  the 16            
                         
Number of days with:                      
Air Frost 7   0.2mm rain 22   No  sun 10   Snow lying 3    
Grnd Frost 19   1.0mm 14   3h  sun 8   Snow/sleet 7    
Max < 0ēC 0   5mm 6   6h  sun 3   Hail 0    
Max > 10 8   10mm 1   9h  sun 0   Thunder 0    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 2    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: