Monthly Climate Summary for   June   2009  at Luton (Cranleigh Gardens)
                          home daily
                     Alternating warm and cold periods;  some heavy thundery downpours                              back forward
                         
Overall mean temperature was 15.6 ēC which is +1.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 20.8 ēC which is +1.8 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 10.3 ēC which is +0.4 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 20.8 ēC                
Mean 24hr minimum (09-09) was 10.3 ēC                
  Highest day max was 29.3 ēC on  the   30                 
  Lowest day max was 11.7 ēC on  the 5            
  Highest night min was 16.4 ēC on  the 29            
  Lowest night min was 3.0 ēC on  the 4            
  Lowest grass min was -1.8 ēC on  the 4            
                         
Total rainfall this month was 77.9 mm which is 122.7 per  cent of the 1971-2000 average    
  Highest daily fall was 19.1 mm on  the 6            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 28.7 hrs which is 109.1 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 10.0 hrs on  the 1            
  Mean rainfall intensity 2.71 mm/hr                
                         
Total CS sunshine this month was 198.9 hrs which is 111.2 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 14.6 hrs on  the 1            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1018.2 mbar which is +1.4 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1029.6 mbar on  the 23            
  Lowest  pressure at 09Z 1001.3 mbar on  the 7            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 12   No  sun 2   Snow lying 0    
Grnd Frost 2   1.0mm 10   3h  sun 22   Snow/sleet 0    
Max < 0ēC 0   5mm 5   6h  sun 14   Hail 1    
Max > 10 30   10mm 3   9h  sun 9   Thunder 4    
Max > 20 18   25mm 0   12h sun 5   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: