Monthly Climate Summary for December 2006 at Luton (Cranleigh Gardens)
                          home daily
                  Very mild and unsettled first half; cold and foggy before Christmas       back forward
                         
Overall mean temperature was 6.4 ēC which is +1.5 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 8.5 ēC which is +1.4 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 4.4 ēC which is +1.7 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 8.8 ēC                
Mean 24hr minimum (09-09) was 3.6 ēC                
  Highest day max was 14.0 ēC on  the   4            
  Lowest day max was 0.8 ēC on  the 22            
  Highest night min was 12.8 ēC on  the 5            
  Lowest night min was -4.3 ēC on  the 20            
  Lowest grass min was -8.4 ēC on  the 20            
                         
Total rainfall this month was 75.0 mm which is 110.8 per  cent of the 1971-2000 average    
  Highest daily fall was 12.4 mm on  the 29            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 73.3 hrs which is 117.8 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 16.0 hrs on  the 10            
  Mean rainfall intensity 1.02 mm/hr                
                         
Total CS sunshine this month was 51.9 hrs which is 107.0 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 6.0 hrs on  the 20            
                         
Maximum  snow depth  was 0.0 cm on  the  28 and 30            
                         
Mean sea-level pressure at 09Z 1019.4 mbar which is +4.8 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1044.8 mbar on  the 22            
  Lowest  pressure at 09Z 984.0 mbar on  the 8            
                         
Number of days with:                      
Air Frost 6   0.2mm rain 17   No  sun 14   Snow lying 0    
Grnd Frost 11   1.0mm 12   3h  sun 8   Snow/sleet 0    
Max < 0ēC 0   5mm 8   6h  sun 1   Hail 0    
Max > 10 15   10mm 2   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:                  
Warmest December since 1988;  4th was the warmest December day since 1994, and the night of the 4th/5th was the warmest     
          December night on record (since before 1900)