Monthly Climate Summary for December 2010 at Luton (Cranleigh Gardens)
                          home daily
                 Exceptionally cold till the 9th and from the 16th-27th; very wintry at times       back forward
                         
Overall mean temperature was -0.2 ēC which is -5.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 1.9 ēC which is -5.2 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was -2.4 ēC which is -5.1 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 2.3 ēC                
Mean 24hr minimum (09-09) was -3.2 ēC                
  Highest day max was 7.5 ēC on  the   11            
  Lowest day max was -2.5 ēC on  the 17            
  Highest night min was 5.1 ēC on  the 29            
  Lowest night min was -13.1 ēC on  the 20            
  Lowest grass min was -16.7 ēC on  the 20            
                         
Total rainfall this month was 35.2 mm which is 52.0 per  cent of the 1971-2000 average    
  Highest daily fall was 11.0 mm on  the 18            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 48.4 hrs which is 77.8 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 7.5 hrs on  the 13            
  Mean rainfall intensity 0.73 mm/hr                
                         
Total CS sunshine this month was 20.6 hrs which is 42.5 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 4.1 hrs on  the 7            
                         
Maximum  snow depth  was 12.0 cm on  the  22            
                         
Mean sea-level pressure at 09Z 1016.4 mbar which is +1.8 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1038.3 mbar on  the 15            
  Lowest  pressure at 09Z 993.5 mbar on  the 18            
                         
Number of days with:                      
Air Frost 23   0.2mm rain 13   No  sun 19   Snow lying 14    
Grnd Frost 24   1.0mm 9   3h  sun 3   Snow/sleet 12    
Max < 0ēC 11   5mm 2   6h  sun 0   Hail 0    
Max > 10 0   10mm 1   9h  sun 0   Thunder 0    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 9    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: