Monthly Climate Summary for January 2007 at Hampstead  
                        home daily
             Exceptionally mild and unsettled till the 20th, then a brief cold snap   back forward
                       
Overall mean temperature was 7.0 ēC which is +2.9 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 9.5 ēC              
Mean night minimum (21-09) was 4.8 ēC              
Mean 24hr maximum (09-09) was 9.6 ēC which is +3.0 degC compared with the 1971-2000 average
Mean 24hr minimum (09-09) was 4.4 ēC which is +2.7 degC compared with the 1971-2000 average
  Highest day max was 13.5 ēC on  the   18          
  Lowest day max was 2.8 ēC on  the 23          
  Highest night min was 11.5 ēC on  the 9          
  Lowest night min was -2.4 ēC on  the 26          
  Lowest grass min was -5.4 ēC on  the 26          
                       
Total rainfall this month was 66.7 mm which is 105.8 per  cent of the 1971-2000 average  
  Highest daily fall was 12.8 mm on  the 6          
Number of hours with rain was 85.0 hrs              
Equiv. TSR rainfall duration was 59.5 hrs which is 96.0 per  cent of the 1971-2000 average  
  Highest no of wet hrs 10.0 hrs on  the 16          
  Highest equiv duration 8.3 hrs on  the 16          
Mean rainfall intensity 1.12 mm/h              
                       
Total sunshine this month was 69.2 hrs which is 163.5 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 76.1 hrs which is 163.5 per  cent of the 1971-2000 average  
  Highest daily sun was 7.4 hrs on  the 31          
                       
Maximum  snow depth  was 2.0 cm on the 24          
                       
Mean sea-level pressure at 09Z 1016.9 mbar which is +2.0 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1032.5 mbar on  the 27          
  Lowest  pressure at 09Z 988.1 mbar on  the 18          
                       
Number of days with:                    
Air Frost 4   0.2mm rain 21   No  sun 7   Snow lying 1  
Grnd Frost 6   1.0mm 12   3h  sun 11   Snow/sleet 5  
Max < 0ēC 0   5mm 4   6h  sun 2   Hail 0  
Max > 10 17   10mm 3   9h  sun 0   Thunder 0  
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 0  
Max > 30 0         15h sun 0   Gale 1  
                       
Notable events during the month:                 
Warmest January since 1921