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Monthly Normals and Extreme Values for Hong Kong in January
Monthly Normals of Meteorological Elements for January 1981-2010,
with Extreme Values between 1884-1939 and 1947-2011 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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1035.4
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hPa
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6/1/1903
Mean 1020.3 hPa  
Absolute Minimum 1003.1 hPa 29/1/1980
Mean Diurnal Range 4.1 hPa  
AIR TEMPERATURE Absolute Maximum 26.9 deg. C 29/1/1959
Mean Daily Maximum 18.6 deg. C  
Mean 16.3 deg. C  
Mean Daily Minimum 14.5 deg. C  
Absolute Minimum 0.0 deg. C 18/1/1893
RELATIVE HUMIDITY Mean 74 %  
Absolute Minimum 10 % 16/1/1959
AMOUNT OF CLOUD 61 %  
RAINFALL Total 24.7 mm  
Duration 46 hours  
Number of
Days with
0.1 mm
or above
5.37    
25.0 mm
or above
0.23    
50.0 mm
or above
0.00    
Maximum Hourly 21.8 mm 3/1/1956
Maximum Daily 99.8 mm 26/1/1887
Maximum Monthly 214.3 mm 1887
NUMBER OF DAYS WITH THUNDERSTORM 0.13    
NUMBER OF DAYS WITH FOG (Visibility < 1000 m) 0.30    
SOIL TEMPERATURE
AT 0700 HOURS
0.5 m 18.8 deg. C  
1.0 m 20.3 deg. C  
BRIGHT SUNSHINE
AT KING'S PARK
Duration 143.0 hours  
Percentage of Possible 42 %  
WIND
AT WAGLAN ISLAND
Prevailing Direction 060 degrees  
Mean Speed 25.3 km/h  
Maximum Gust # 103 km/h 15/1/1955
SEA SURFACE TEMPERATURE
AT NORTH POINT AT 0700 HOURS
17.4 deg. C  

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

 #  1953 - 2011

Last revision date: <20 Dec 2012>