Monthly Climate Summary for  February 2010 at Chesham (Tennis Club)
                          home daily
                         Mostly rather cold and cloudy with frequent rain and/or snow       back forward
                         
Overall mean temperature was 2.7 ēC which is -0.9 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 5.3 ēC which is -2.0 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was 0.2 ēC which is +0.3 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 5.3 ēC                
Mean 24hr minimum (09-09) was -0.1 ēC                
  Highest day max was 10.4 ēC on  the   5            
  Lowest day max was 1.0 ēC on  the 8            
  Highest night min was 5.3 ēC on  the 25            
  Lowest night min was -5.6 ēC on  the 21            
  Lowest grass min was   ēC on  the              
                         
Total rainfall this month was 76.0 mm which is 149.3 per  cent of the 1971-2000 average    
  Highest daily fall was 10.9 mm on  the 27            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 28.5 hrs which is 55.4 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 3.9 hrs on  the 27            
  Mean rainfall intensity 2.67 mm/hr                
                         
Total est sunshine this month was 40.0 hrs which is 57.0 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 5.2 hrs on  the 17            
                         
Maximum  snow depth  was 0.0 cm on  the               
                         
Mean sea-level pressure at 09Z 1002.5 mbar which is -12.7 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1023.6 mbar on  the 7            
  Lowest  pressure at 09Z 982.8 mbar on  the 28            
                         
Total number of days with:                      
Air Frost 12   0.2mm rain 26   No  sun 10   Snow lying 0    
Grnd Frost 0   1.0mm 15   3h  sun 6   Snow/sleet 0    
Max < 0ēC 0   5mm 5   6h  sun 0   Hail 0    
Max > 10 1   10mm 2   9h  sun 0   Thunder 0    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 0    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: