Monthly Climate Summary for December 1981 at Whipsnade, Beds
                          home daily
                              Unsettled, windy, and very wet. Brief wintry spell 25th-28th             Exceptionally cold with frequent heavy snowfalls       back forward
                         
Overall mean temperature was -0.5 ēC which is -4.3 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 1.4 ēC which is -4.8 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was -2.3 ēC which is -3.8 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 1.6 ēC                
Mean 24hr minimum (09-09) was -3.0 ēC                
  Highest day max was 7.9 ēC on  the   3            
  Lowest day max was -3.4 ēC on  the 12            
  Highest night min was 3.0 ēC on  the 7            
  Lowest night min was -8.8 ēC on  the 23            
  Lowest grass min was -14.2 ēC on  the 13            
                         
Total rainfall this month was 68.3 mm which is 96.2 per  cent of the 1971-2000 average    
  Highest daily fall was 12.1 mm on  the 7            
Number of hours with rain was                    
Equiv. TSR rainfall duration was   hrs which is   per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration   hrs on  the              
  Mean rainfall intensity   mm/hr                
                         
Total CS sunshine this month was 51.5 hrs which is 106.2 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 6.2 hrs on  the 12            
                         
Maximum  snow depth  was 21.0 cm on  the  22            
                         
Mean sea-level pressure at 09Z 1002.4 mbar which is -12.2 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1035.2 mbar on  the 3            
  Lowest  pressure at 09Z 976.5 mbar on  the 30            
                         
Number of days with:                      
Air Frost 23   0.2mm rain 14   No  sun 14   Snow lying 23    
Grnd Frost 27   1.0mm 12   3h  sun 9   Snow/sleet 13    
Max < 0ēC 14   5mm 7   6h  sun 1   Hail 0    
Max > 10 0   10mm 2   9h  sun 0   Thunder 0    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 7    
Max > 30 0         15h sun 0   Gale 3    
                         
Notable events during the month:                  
Three heavy snowfalls, on the 7th/8th, the 11th, and the 13th; a very strong SE wind on the 13th caused severe drifting of all the snow on the
                         
                         
ground, but it was followed by a thaw. Whipsnade village cut off for 24 hours.