Monthly Climate Summary for  June  2004  at Luton (Cranleigh Gardens)
                          home daily
       Dry and very warm first half; cool and sometimes wet second half. Low pressure on 23rd. back forward
                         
Overall mean temperature was 16.4 ēC which is +2.0 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 21.5 ēC which is +2.5 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 11.4 ēC which is +1.5 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 21.3 ēC                
Mean 24hr minimum (09-09) was 11.4 ēC                
  Highest day max was 31.0 ēC on  the   8            
  Lowest day max was 17.3 ēC on  the 1            
  Highest night min was 15.4 ēC on  the 9            
  Lowest night min was 5.1 ēC on  the 19            
  Lowest grass min was 1.6 ēC on  the 19            
                         
Total rainfall this month was 28.0 mm which is 44.1 per  cent of the 1971-2000 average    
  Highest daily fall was 11.2 mm on  the 22            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 21.4 hrs which is 48.3 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 8.1 hrs on  the 22            
  Mean rainfall intensity 1.31 mm/hr                
                         
Total CS sunshine this month was 212.4 hrs which is 118.7 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 14.8 hrs on  the 14            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1017.3 mbar which is +0.5 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1032.5 mbar on  the 13            
  Lowest  pressure at 09Z 989.5 mbar on  the 23            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 10   No  sun 1   Snow lying 0    
Grnd Frost 0   1.0mm 7   3h  sun 23   Snow/sleet 0    
Max < 0ēC 0   5mm 2   6h  sun 19   Hail 0    
Max > 10 30   10mm 1   9h  sun 12   Thunder 1    
Max > 20 19   25mm 0   12h sun 5   Fog at 09Z 0    
Max > 30 1         15h sun 0   Gale 0    
                         
Notable events during the month:                  
Maximum of 31.0ēC on the 8th was the highest so early in the month since 1996            
Barometer fell to 988.6 mbar at 1100z on the 23rd - the lowest in June since 21st/1997          
First half warmest since 1947; second half coolest since 1997              
Wind gusted to 43 mph on both the 23rd and 24th