Monthly Climate Summary for  January 2010  at Luton (Cranleigh Gardens)
                          home daily
                    Very cold first half with frequent snow;  variable second half with near average temperature   back forward
                         
Overall mean temperature was 1.1 ēC which is -3.0 degC compared with the 1971-2000 average  
Mean day maximum (09-21) was 2.8 ēC which is -3.6 degC compared with the 1971-2000 average  
Mean night minimum (21-09) was -0.7 ēC which is -2.4 degC compared with the 1971-2000 average  
Mean 24hr maximum (09-09) was 2.9 ēC                
Mean 24hr minimum (09-09) was -1.0 ēC                
  Highest day max was 8.6 ēC on  the   18                 
  Lowest day max was -2.5 ēC on  the 4            
  Highest night min was 4.4 ēC on  the 19            
  Lowest night min was -7.5 ēC on  the 7            
  Lowest grass min was -16.1 ēC on  the 7            
                         
Total rainfall this month was 49.9 mm which is 73.3 per  cent of the 1971-2000 average    
  Highest daily fall was 8.3 mm on  the 22            
Number of hours with rain was                    
Equiv. TSR rainfall duration was 76.2 hrs which is 111.7 per  cent of the 1971-2000 average    
  Highest no of wet hrs   hrs on  the              
  Highest duration 12.5 hrs on  the 30            
  Mean rainfall intensity 0.65 mm/hr                
                         
Total CS sunshine this month was 43.8 hrs which is 83.3 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 6.7 hrs on  the 30            
                         
Maximum  snow depth  was 11.0 cm on  the  7            
                         
Mean sea-level pressure at 09Z 1015.7 mbar which is +1.1 mbar compared with the 1961-1990 average  
  Highest pressure at 09Z 1040.8 mbar on  the 26            
  Lowest  pressure at 09Z 990.4 mbar on  the 29            
                         
Number of days with:                      
Air Frost 19   0.2mm rain 18   No  sun 13   Snow lying 12    
Grnd Frost 26   1.0mm 13   3h  sun 4   Snow/sleet 13    
Max < 0ēC 5   5mm 4   6h  sun 3   Hail 1    
Max > 10 0   10mm 0   9h  sun 0   Thunder 0    
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 1    
Max > 30 0         15h sun 0   Gale 0    
                         
Notable events during the month: