Monthly Climate Summary for  March  2007 at Hampstead  
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                                Exceptionally sunny; brief wintry spell 18th-22nd   back forward
                       
Overall mean temperature was 8.1 ēC which is +1.6 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 12.1 ēC              
Mean night minimum (21-09) was 4.1 ēC              
Mean 24hr maximum (09-09) was 12.2 ēC which is +2.2 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 3.9 ēC which is +0.9 degC compared with the 1971-2000 average
  Highest day max was 17.6 ēC on  the   12          
  Lowest day max was 5.9 ēC on  the 20          
  Highest night min was 8.2 ēC on  the 6          
  Lowest night min was -2.0 ēC on  the 22          
  Lowest grass min was -5.2 ēC on  the 22          
                       
Total rainfall this month was 57.4 mm which is 112.6 per  cent of the 1971-2000 average  
  Highest daily fall was 17.8 mm on  the 5          
Number of hours with rain was 78.0 hrs              
Equiv. TSR rainfall duration was 54.6 hrs which is 113.8 per  cent of the 1971-2000 average  
  Highest no of wet hrs 10.0 hrs on  the 2          
  Highest equiv duration 8.3 hrs on  the 2          
Mean rainfall intensity 1.05 mm/h              
                       
Total sunshine this month was 159.6 hrs which is 159.8 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 175.6 hrs which is 159.8 per  cent of the 1971-2000 average  
  Highest daily sun was 10.0 hrs on  the 26          
                       
Maximum  snow depth  was   cm on the            
                       
Mean sea-level pressure at 09Z 1017.2 mbar which is +2.4 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1037.3 mbar on  the 10          
  Lowest  pressure at 09Z 992.6 mbar on  the 1          
                       
Number of days with:                    
Air Frost 2   0.2mm rain 20   No  sun 0   Snow lying 0  
Grnd Frost 7   1.0mm 10   3h  sun 24   Snow/sleet 4  
Max < 0ēC 0   5mm 3   6h  sun 14   Hail 3  
Max > 10 22   10mm 1   9h  sun 3   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:                 
Sunniest March since 2003      
Remnants of snow-cover on the mornings of the 19th, 20th and 22nd