Monthly Climate Summary for September 2008  at Luton (Cranleigh Gardens)
                          home daily
                      Cool, dull and very wet first half (especially the first week); mostly dry and bright second half                           back forward
                         
Overall mean temperature was 13.8 ēC which is -0.3 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 17.9 ēC which is -0.5 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 9.6 ēC which is -0.1 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 17.9 ēC                
Mean 24hr minimum (09-09) was 9.6 ēC                
  Highest day max was 20.6 ēC on  the   20                 
  Lowest day max was 14.4 ēC on  the 30            
  Highest night min was 14.5 ēC on  the 11            
  Lowest night min was 4.0 ēC on  the 28            
  Lowest grass min was 0.4 ēC on  the 28            
                         
Total rainfall this month was 74.3 mm which is 115.9 per  cent of the 1971-2000 average    
  Highest daily fall was 30.5 mm on  the 5            
Number of hours with rain was                    
TSR rainfall duration was 44.4 hrs which is 109.1 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 14.0 hrs on  the 5            
  Mean rainfall intensity 1.67 mm/hr                
                         
Total CS sunshine this month was 109.6 hrs which is 80.3 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 8.9 hrs on  the 26            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1018.1 mbar which is 1.7 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1038.0 mbar on  the 26            
  Lowest  pressure at 09Z 993.6 mbar on  the 6            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 17   No  sun 2   Snow lying 0    
Grnd Frost 0   1.0mm 10   3h  sun 16   Snow/sleet 0    
Max < 0ēC 0   5mm 4   6h  sun 9   Hail 1    
Max > 10 30   10mm 2   9h  sun 0   Thunder 2    
Max > 20 4   25mm 1   12h sun 0   Fog at 09Z 2    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: