Monthly Climate Summary for   July  2006  at Luton (Cranleigh Gardens)
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                           Hottest July (and hottest calendar month) on record. Violent thunderstorm on the 4th                              back forward
                         
Overall mean temperature was 21.2 ēC which is +4.1 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 27.6 ēC which is +5.5 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 14.8 ēC which is +2.7 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 27.6 ēC                
Mean 24hr minimum (09-09) was 14.8 ēC                
  Highest day max was 35.1 ēC on  the   19                 
  Lowest day max was 21.5 ēC on  the 7            
  Highest night min was 20.6 ēC on  the 20            
  Lowest night min was 9.0 ēC on  the 15            
  Lowest grass min was 3.6 ēC on  the 15            
                         
Total rainfall this month was 47.7 mm which is 107.0 per  cent of the 1971-2000 average    
  Highest daily fall was 27.3 mm on  the 4            
Number of hours with rain was                    
TSR rainfall duration was 18.7 hrs which is 60.7 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 3.8 hrs on  the 5            
  Mean rainfall intensity 2.55 mm/hr                
                         
Total CS sunshine this month was 289.7 hrs which is 152.2 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 14.7 hrs on  the 17            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1019.5 mbar which is +2.2 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1033.3 mbar on  the 14            
  Lowest  pressure at 09Z 1008.7 mbar on  the 9            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 13   No  sun 0   Snow lying 0    
Grnd Frost 0   1.0mm 9   3h  sun 28   Snow/sleet 0    
Max < 0ēC 0   5mm 2   6h  sun 22   Hail 1    
Max > 10 31   10mm 1   9h  sun 17   Thunder 5    
Max > 20 31   25mm 1   12h sun 12   Fog at 09Z 0    
Max > 30 11         15h sun 0   Gale 0    
                         
Notable events during the month:                  
This was the hottest July (and hottest calendar month) since the composite record began in 1900        
A severe thunderstorm on the afternoon of the 4th resulted in serious wind and hail damage, hailstones measured 10-12mm across, and  
     26mm of rain fell in 20 mins.