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Monthly Normals of Meteorological Elements for December 1971-2000,
with Extreme Values between 1884-1939 and 1947-2008 for Hong Kong
 
Meteorological Elements Date on which
extreme value
was recorded
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ATMOSPHERIC
PRESSURE
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Absolute Maximum
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1033.5
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hPa
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31/12/1913
Mean 1020.5 hPa  
Absolute Minimum 1004.6 hPa 2/12/1974
Mean Diurnal Range 4.0 hPa  
AIR TEMPERATURE Absolute Maximum 28.7 deg. C 1/12/1953
Mean Daily Maximum 20.3 deg. C  
Mean 17.8 deg. C  
Mean Daily Minimum 15.7 deg. C  
Absolute Minimum 4.3 deg. C 14/12/1975
RELATIVE HUMIDITY Mean 69 %  
Absolute Minimum 14 % 14/12/1898
31/12/1973
AMOUNT OF CLOUD 51 %  
RAINFALL Total 34.5 mm  
Duration 36 hours  
Number of
Days with
0.1 mm
or above
4.27    
25.0 mm
or above
0.30    
50.0 mm
or above
0.13    
Maximum Hourly 51.7 mm 9/12/1931
Maximum Daily 177.3 mm 2/12/1974
Maximum Monthly 206.9 mm 1974
NUMBER OF DAYS WITH THUNDERSTORM 0    
NUMBER OF DAYS WITH FOG (Visibility < 1000 m) 0.03    
SOIL TEMPERATURE
AT 0700 HOURS
0.5 m 20.5 deg. C  
1.0 m 22.4 deg. C  
BRIGHT SUNSHINE
AT KING'S PARK
Duration 173.3 hours  
Percentage of Possible 52 %  
WIND
AT WAGLAN ISLAND
Prevailing Direction 070 degrees  
Mean Speed 26.5 km/h  
Maximum Gust # 108 km/h 28/12/1991
SEA SURFACE TEMPERATURE
AT NORTH POINT AT 0700 HOURS **
19.8 deg. C  


Note : All measurements were made at the Hong Kong Observatory except where specified.

 #  1953 - 2008
** 1975 - 2008

 2003 | Important notices | Privacy policy Last revision date: <07 Jan 2009>