Monthly Climate Summary for December 2004 at Milhaguet (Carreau)
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                         Dry till the 16th, often sunny and mild; then changeable and rather cold     Back Forward
                       
Overall mean temperature was 3.4 ēC which is -0.7 degC compared with the 1971-2000 average
Mean day maximum (09-21) was 6.6 ēC which is -0.5 degC compared with the 1971-2000 average
Mean night minimum (21-09) was 0.2 ēC which is -0.9 degC compared with the 1971-2000 average
Mean 24hr maximum (09-09) was 7.0 ēC                 
Mean 24hr minimum (09-09) was 0.0 ēC              
  Highest day max was 13.3 ēC on  the   10          
  Lowest day max was -0.4 ēC on  the 20          
  Highest night min was 6.6 ēC on  the 24          
  Lowest night min was -6.7 ēC on  the 21          
  Lowest grass min was -5.4 ēC on  the 21          
                       
Total rainfall this month was 117.3 mm which is 99.4 per  cent of the 1971-2000 average  
  Highest daily fall was 20.5 mm on  the 17          
Number of hours with rain was 149.0 hrs              
Equiv. TSR rainfall duration was 104.3 hrs which is   per  cent of the 1971-2000 average  
  Highest no of wet hrs 19.0 hrs on  the 18          
  Highest equiv duration 15.2 hrs on  the 18          
  Mean rainfall intensity 1.12 mm/h              
                       
Total sunshine this month was 4.2 hrs which is 84.0 per  cent of the 1971-2000 average  
Equiv. C/S sunshine total was 4.6 hrs which is 84.0 per  cent of the 1971-2000 average  
  Highest daily sun was 0.4 hrs on  the 1          
                       
Maximum  snow depth  was 0.0 cm on  the             
                       
Mean sea-level pressure at 09Z 1020.7 mbar which is +2.1 mbar compared with the 1961-1990 average
  Highest pressure at 09Z 1035.7 mbar on  the 30          
  Lowest pressure at 09Z 1003.1 mbar on  the 2          
                       
Number of days with:                    
Air Frost 15   0.2mm rain 17   No  sun 12   Snow lying 0  
Grnd Frost 20   1.0mm 14   3h  sun 0   Snow/sleet 6  
Max < 0ēC 2   5mm 9   6h  sun 0   Hail 0  
Max > 10 6   10mm 3   9h  sun 0   Thunder 1  
Max > 20 0   25mm 0   12h sun 0   Fog at 09Z 6  
Max > 30 0   50mm 0   15h sun 0   Gale 0  
                       
Notable events during the month:                
Rainfall 1st-15th was 7.9mm; from the 16th-31st it was 109.4mm