Monthly Climate Summary for December 2005 at Luton (Cranleigh Gardens)
                          home daily
                    Dry and anticyclonic from the 8th-28th; post-Christmas cold snap       back forward
                         
Overall mean temperature was 4.4 ēC which is -0.5 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 6.9 ēC which is -0.2 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 1.9 ēC which is -0.8 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 7.1 ēC                
Mean 24hr minimum (09-09) was 1.1 ēC                
  Highest day max was 10.6 ēC on  the   16            
  Lowest day max was -1.9 ēC on  the 29            
  Highest night min was 7.7 ēC on  the 23            
  Lowest night min was -4.9 ēC on  the 18            
  Lowest grass min was -9.6 ēC on  the 18            
                         
Total rainfall this month was 51.5 mm which is 76.1 per  cent of the 1971-2000 average    
  Highest daily fall was 12.7 mm on  the 1            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 47.5 hrs which is 76.4 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 14.0 hrs on  the 1            
  Mean rainfall intensity 1.08 mm/hr                
                         
Total CS sunshine this month was 62.4 hrs which is 128.7 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 5.5 hrs on  the 11            
                         
Maximum  snow depth  was 1.0 cm on  the  28 and 30            
                         
Mean sea-level pressure at 09Z 1017.5 mbar which is +2.9 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1040.5 mbar on  the 13            
  Lowest  pressure at 09Z 979.8 mbar on  the 2            
                         
Number of days with:                      
Air Frost 12   0.2mm rain 16   No  sun 4   Snow lying 4    
Grnd Frost 23   1.0mm 9   3h  sun 11   Snow/sleet 4    
Max < 0ēC 1   5mm 5   6h  sun 0   Hail 0    
Max > 10 2   10mm 2   9h  sun 0   Thunder 1    
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:                  
Coldest and sunniest December since 2001                  
Absolute maximum of 10.6°C on the 16th was the lowest in December since 1981          
Lowest day maximum of -1.9°C on the 29th was the lowest in December since 1996          
Only 1.5mm of rain between 8th and 25th inc, and 4.6mm between 8th and 28th