Monthly Climate Summary for December 2007 at Luton (Cranleigh Gardens)
                          home daily
           Very mild and unsettled early and late;  lengthy anticyclonic spell 11th-24th       back forward
                         
Overall mean temperature was 4.9 ēC which is 0.0 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 7.3 ēC which is +0.2 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 2.5 ēC which is -0.2 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 7.4 ēC                
Mean 24hr minimum (09-09) was 1.9 ēC                
  Highest day max was 13.6 ēC on  the   6            
  Lowest day max was 2.1 ēC on  the 20            
  Highest night min was 11.8 ēC on  the 5            
  Lowest night min was -6.5 ēC on  the 20            
  Lowest grass min was -9.6 ēC on  the 20            
                         
Total rainfall this month was 60.3 mm which is 89.1 per  cent of the 1971-2000 average    
  Highest daily fall was 13.1 mm on  the 24            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 40.7 hrs which is 65.4 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 6.1 hrs on  the 8            
  Mean rainfall intensity 1.48 mm/hr                
                         
Total CS sunshine this month was 58.2 hrs which is 120.0 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 11            
                         
Maximum  snow depth  was 0.0 cm on  the  28 and 30            
                         
Mean sea-level pressure at 09Z 1020.9 mbar which is +6.3 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1042.0 mbar on  the 13            
  Lowest  pressure at 09Z 980.4 mbar on  the 9            
                         
Number of days with:                      
Air Frost 10   0.2mm rain 13   No  sun 9   Snow lying 0    
Grnd Frost 12   1.0mm 10   3h  sun 10   Snow/sleet 0    
Max < 0ēC 0   5mm 6   6h  sun 3   Hail 0    
Max > 10 7   10mm 1   9h  sun 0   Thunder 1    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 3    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: