Monthly Climate Summary for  April  2010  at Luton (Cranleigh Gardens)
                          home daily
                     Changeable early and late, but a long fine spell 8th-24th with warm days and cool nights   back forward
                         
Overall mean temperature was 9.6 ēC which is +1.3 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 15.2 ēC which is +2.6 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 4.0 ēC which is +0.1 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 15.2 ēC                
Mean 24hr minimum (09-09) was 4.0 ēC                
  Highest day max was 21.4 ēC on  the   28                 
  Lowest day max was 9.8 ēC on  the 2            
  Highest night min was 10.1 ēC on  the 25            
  Lowest night min was 0.0 ēC on  the 17            
  Lowest grass min was -4.9 ēC on  the 17            
                         
Total rainfall this month was 24.5 mm which is 42.4 per  cent of the 1971-2000 average    
  Highest daily fall was 5.7 mm on  the 29            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 12.0 hrs which is 26.0 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 2.8 hrs on  the 23            
  Mean rainfall intensity 2.04 mm/hr                
                         
Total CS sunshine this month was 202.7 hrs which is 145.9 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 12.8 hrs on  the 23            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1020.6 mbar which is +5.4 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1035.1 mbar on  the 10            
  Lowest  pressure at 09Z 1001.5 mbar on  the 3            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 9   No  sun 0   Snow lying 0    
Grnd Frost 17   1.0mm 6   3h  sun 24   Snow/sleet 0    
Max < 0ēC 0   5mm 3   6h  sun 17   Hail 0    
Max > 10 29   10mm 0   9h  sun 9   Thunder 0    
Max > 20 3   25mm 0   12h sun 2   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: