Monthly Climate Summary for October 2004 at Hampstead  
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               Another very wet October.  Marked shortage of sunshine mid-month.   back forward
                       
Overall mean temperature was 11.3 ēC which is +0.2 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 14.3 ēC              
Mean night minimum (21-09) was 8.3 ēC              
Mean 24hr maximum (09-09) was 14.3 ēC which is +0.1 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 8.3 ēC which is +0.2 degC compared with the 1971-2000 average
  Highest day max was 17.6 ēC on  the   24          
  Lowest day max was 9.1 ēC on  the 15          
  Highest night min was 13.1 ēC on  the 24          
  Lowest night min was 4.7 ēC on  the 26          
  Lowest grass min was -1.3 ēC on  the 19          
                       
Total rainfall this month was 135.6 mm which is 196.6 per  cent of the 1971-2000 average  
  Highest daily fall was 31.7 mm on  the 13          
Number of hours with rain was 128.0 hrs              
Equiv. TSR rainfall duration was 89.6 hrs which is 190.6 per  cent of the 1971-2000 average  
  Highest no of wet hrs 16.0 hrs on  the 3          
  Highest equiv duration 13.3 hrs on  the 3          
                       
Total sunshine this month was 74.9 hrs which is 99.9 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 82.4 hrs which is 99.9 per  cent of the 1971-2000 average  
  Highest daily sun was 6.0 hrs on  the 30          
                       
Maximum  snow depth  was 0.0 cm              
                       
Mean sea-level pressure at 09Z 1007.8 mbar which is -7.9 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1022.4 mbar on  the 31          
  Lowest  pressure at 09Z 991.3 mbar on  the 20          
                       
Number of days with:                    
Air Frost 0   0.2mm rain 22   No  sun 1   Snow lying 0  
Grnd Frost 1   1.0mm 17   3h  sun 12   Snow/sleet 0  
Max < 0ēC 0   5mm 9   6h  sun 1   Hail 0  
Max > 10 30   10mm 6   9h  sun 0   Thunder 1  
Max > 20 0   25mm 1   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 0  
                       
Notable events during the month:                 
Only 10.5hr of sunshine between 11th and 20th inclusive      
Highest max of 17.6ēC was lowest for Ocober since 1993