Monthly Climate Summary for September 2005 at Luton (Cranleigh Gardens)
                          home daily
Warmest September since 1999; moderately sunny and dry in spite of disturbed last week back forward
                         
Overall mean temperature was 15.8 C which is +1.8 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 20.6 C which is +2.2 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 11.0 C which is +1.3 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 20.6 C                
Mean 24hr minimum (09-09) was 11.0 C                
  Highest day max was 28.3 C on the 4            
  Lowest day max was 14.4 C on the 16            
  Highest night min was 17.4 C on the 5            
  Lowest night min was 1.4 C on the 17            
  Lowest grass min was -0.5 C on the 17            
                         
Total rainfall this month was 60.3 mm which is 94.1 per cent of the 1971-2000 average    
  Highest daily fall was 12.3 mm on the 10            
Number of hours with rain was                    
TSR rainfall duration was 50.9 hrs which is 125.1 per cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on the              
  Highest duration 12.2 hrs on the 15            
  Mean rainfall intensity 1.18 mm/hr                
                         
Total CS sunshine this month was 147.8 hrs which is 108.3 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 11.2 hrs on the 2            
                         
Maximum snow depth was 0.0 cm on the              
                         
Mean sea-level pressure at 09Z 1018.3 mbar which is +1.9 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1029.3 mbar on the 3            
  Lowest pressure at 09Z 1008.2 mbar on the 25            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 15   No sun 4   Snow lying 0    
Grnd Frost 1   1.0mm 11   3h sun 21   Snow/sleet 0    
Max < 0C 0   5mm 5   6h sun 15   Hail 0    
Max > 10 30   10mm 1   9h sun 2   Thunder 3    
Max > 20 17   25mm 0   12h sun 0   Fog at 09Z 1    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month:                  
Max of 28.3C on the 4th was the highest in September since 1999              
Min of 17.4C on the 5th was the equal second highest on record (alongside 5th in 1973, and behind 4th in 1949)      
Min of 1.4C on the 17th was the lowest this early in the season since 1986