Monthly Climate Summary for  March  2011  at Hampstead  
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              A very dry and sunny month; rather cold first week then many warm days   back forward
                       
Overall mean temperature was 7.2 ēC which is +0.7 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 11.0 ēC              
Mean night minimum (21-09) was 3.6 ēC              
Mean 24hr maximum (09-09) was 11.0 ēC which is +1.0 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 3.4 ēC which is +0.4 degC compared with the 1971-2000 average
  Highest day max was 17.9 ēC on  the   25          
  Lowest day max was 3.4 ēC on  the 3          
  Highest night min was 8.9 ēC on  the 30          
  Lowest night min was -1.3 ēC on  the 3          
  Lowest grass min was -9.6 ēC on  the 8          
                       
Total rainfall this month was 15.2 mm which is 29.9 per  cent of the 1971-2000 average  
  Highest daily fall was 6.2 mm on  the 18          
Number of hours with rain was 21.0 hrs              
Equiv. TSR rainfall duration was 14.7 hrs which is 30.6 per  cent of the 1971-2000 average  
  Highest no of wet hrs 7.0 hrs on  the 30          
  Highest equiv duration 5.8 hrs on  the 30          
Mean rainfall intensity 1.04 mm/h              
                       
Total sunshine this month was 125.2 hrs which is 125.3 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 137.7 hrs which is 125.3 per  cent of the 1971-2000 average  
  Highest daily sun was 8.9 hrs on  the 19          
                       
Maximum  snow depth  was   cm on the            
                       
Mean sea-level pressure at 09Z 1023.6 mbar which is +8.8 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1042.5 mbar on  the 23          
  Lowest  pressure at 09Z 1000.3 mbar on  the 13          
                       
Number of days with:                    
Air Frost 6   0.2mm rain 8   No  sun 2   Snow lying 0  
Grnd Frost 18   1.0mm 3   3h  sun 18   Snow/sleet 0  
Max < 0ēC 0   5mm 2   6h  sun 10   Hail 0  
Max > 10 20   10mm 0   9h  sun 1   Thunder 0  
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 2  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month: