Monthly Climate Summary for   July  2011  at Luton (Cranleigh Gardens)
                          home daily
                     Dry and rather warm start and finish, otherwise cool and changeable                             back forward
                         
Overall mean temperature was 16.0 ēC which is -1.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 21.0 ēC which is -1.1 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 11.0 ēC which is -1.1 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 21.0 ēC                
Mean 24hr minimum (09-09) was 11.0 ēC                
  Highest day max was 25.9 ēC on  the   31                 
  Lowest day max was 16.3 ēC on  the 13            
  Highest night min was 14.7 ēC on  the 4            
  Lowest night min was 5.9 ēC on  the 30            
  Lowest grass min was 3.3 ēC on  the 30            
                         
Total rainfall this month was 66.5 mm which is 149.1 per  cent of the 1971-2000 average    
  Highest daily fall was 20.3 mm on  the 10            
Number of hours with rain was                    
TSR rainfall duration was 33.3 hrs which is 108.1 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 6.5 hrs on  the 15            
  Mean rainfall intensity 2.00 mm/hr                
                         
Total CS sunshine this month was 153.4 hrs which is 80.6 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 14.0 hrs on  the 24            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1013.6 mbar which is -3.7 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1027.2 mbar on  the 1            
  Lowest  pressure at 09Z 992.2 mbar on  the 17            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 13   No  sun 1   Snow lying 0    
Grnd Frost 0   1.0mm 12   3h  sun 21   Snow/sleet 0    
Max < 0ēC 0   5mm 4   6h  sun 11   Hail 1    
Max > 10 31   10mm 2   9h  sun 6   Thunder 1    
Max > 20 18   25mm 0   12h sun 1   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: