Monthly Climate Summary for September 1993 at Whipsnade, Beds
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Overall mean temperature was 11.9 C which is -1.3 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 15.7 C which is -1.5 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 8.1 C which is -1.2 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 15.7 C                
Mean 24hr minimum (09-09) was 8.1 C                
  Highest day max was 23.4 C on the 1            
  Lowest day max was 7.9 C on the 27            
  Highest night min was 13.1 C on the 9            
  Lowest night min was 3.9 C on the 26            
  Lowest grass min was   C on the              
                         
Total rainfall this month was 123.9 mm which is 217.4 per cent of the 1971-2000 average    
  Highest daily fall was 18.8 mm on the 13            
Number of hours with rain was                    
Equiv. TSR rainfall duration was   hrs which is   per cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on the              
  Highest duration   hrs on the              
  Mean rainfall intensity   mm/hr                
                         
Total CS sunshine this month was 90.7 hrs which is 66.4 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 10.6 hrs on the 1            
                         
Maximum snow depth was 0.0 cm on the              
                         
Mean sea-level pressure at 09Z 1011.9 mbar which is -4.5 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1031.0 mbar on the 1            
  Lowest pressure at 09Z 991.9 mbar on the 13            
                         
Number of days with:                      
Air Frost 0   0.2mm rain 18   No sun 5   Snow lying 0    
Grnd Frost 0   1.0mm 14   3h sun 14   Snow/sleet 0    
Max < 0C 0   5mm 9   6h sun 5   Hail 0    
Max > 10 29   10mm 6   9h sun 1   Thunder 2    
Max > 20 3   25mm 0   12h sun 0   Fog at 09Z 2    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month:                  
                 
<aximum of 7.9C on the 27th was abnormally low - possibly the lowest in September in this district since 1918