Monthly Climate Summary for   May   2010  at Luton (Cranleigh Gardens)
                          home daily
                         Mostly rather cold, apart from a warm week 19th-25th;  rather dry                       back forward
                         
Overall mean temperature was 11.2 ēC which is -0.4 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 16.6 ēC which is +0.1 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 5.8 ēC which is -0.9 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 16.6 ēC                
Mean 24hr minimum (09-09) was 5.8 ēC                
  Highest day max was 28.0 ēC on  the   23                 
  Lowest day max was 8.5 ēC on  the 8            
  Highest night min was 11.1 ēC on  the 25            
  Lowest night min was -1.6 ēC on  the 13            
  Lowest grass min was -5.9 ēC on  the 13            
                         
Total rainfall this month was 38.2 mm which is 71.8 per  cent of the 1971-2000 average    
  Highest daily fall was 25.5 mm on  the 1            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 24.5 hrs which is 82.8 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 11.0 hrs on  the 23            
  Mean rainfall intensity 1.56 mm/hr                
                         
Total CS sunshine this month was 185.1 hrs which is 100.2 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 14.4 hrs on  the 23            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1018.1 mbar which is +3.0 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1032.9 mbar on  the 20            
  Lowest  pressure at 09Z 1009.5 mbar on  the 1            
                         
Number of days with:                      
Air Frost 2   0.2mm rain 7   No  sun 1   Snow lying 0    
Grnd Frost 10   1.0mm 5   3h  sun 22   Snow/sleet 0    
Max < 0ēC 0   5mm 1   6h  sun 16   Hail 0    
Max > 10 29   10mm 1   9h  sun 6   Thunder 0    
Max > 20 6   25mm 1   12h sun 4   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: