Monthly Climate Summary for  May  2003  at Luton (Cranleigh Gardens)
                          home daily
                         Rather warm;  changeable but with below-average rainfall       back forward
                         
Overall mean temperature was 12.7 ēC which is +1.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 17.9 ēC which is +1.4 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 7.5 ēC which is +0.8 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 17.9 ēC                
Mean 24hr minimum (09-09) was 7.5 ēC                
  Highest day max was 28.0 ēC on  the   31            
  Lowest day max was 12.2 ēC on  the 16            
  Highest night min was 13.4 ēC on  the 31            
  Lowest night min was 0.1 ēC on  the 15            
  Lowest grass min was -2.2 ēC on  the 15            
                         
Total rainfall this month was 43.7 mm which is 82.1 per  cent of the 1971-2000 average    
  Highest daily fall was 11.8 mm on  the 1            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 32.2 hrs which is 75.1 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 8.2 hrs on  the 16            
  Mean rainfall intensity 1.36 mm/hr                
                         
Total CS sunshine this month was 195.5 hrs which is 105.8 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 13.5 hrs on  the 30            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1015.6 mbar which is +0.5 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1026.5 mbar on  the 7            
  Lowest  pressure at 09Z 1005.0 mbar on  the 2            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 13   No  sun 1   Snow lying 0    
Grnd Frost 3   1.0mm 9   3h  sun 24   Snow/sleet 0    
Max < 0ēC 0   5mm 5   6h  sun 17   Hail 3    
Max > 10 31   10mm 1   9h  sun 8   Thunder 2    
Max > 20 6   25mm 0   12h sun 3   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month:                  
Max of 28.0ēC on the 31st was the highest in May since 1989              
Min of 0.1ēC on the 15th was the lowest so late in the season since 1996            
Four-month rainfall (Feb-May) of 110.1mm was just 52% of the 1971-200 normal, and the lowest Feb-May total since 1976 (94.4mm)