Monthly Meteorological Normals for Hong Kong

 

Table 1.   Monthly mean numbers of days with tropical cyclone warning signals and
Strong Monsoon Signal in Hong Kong between 1971-2000

Month	Number of Days with Tropical Cyclone Warning Signal				Number of Days with Strong Monsoon Signal
	No. 1 and/or higher	No. 3 and/or higher	No. 8 and/or higher	No. 9 and/or No. 10
January	-	-	-	-	4.33
February	-	-	-	-	4.33
March	-	-	-	-	3.83
April	0.17	0.03	-	-	3.00
May	0.43	0.27	0.07	-	1.60
June	2.23	1.23	0.20	0.03	1.17
July	4.43	2.57	0.57	0.07	0.50
August	3.93	1.67	0.60	0.13	0.17
September	4.53	2.23	0.40	0.07	1.77
October	3.17	2.03	0.20	0.07	5.30
November	0.50	0.17	0.07	-	4.83
December	0.07	0.07	-	-	5.23
Year	19.46	10.27	2.11	0.37	36.07

Figure 1.1.   Monthly mean number of days with tropical cyclone warning signals in Hong Kong between 1971-2000

Figure 1.2.    Monthly mean number of days with Strong Monsoon Signal in Hong Kong between 1971-2000

 

Figure 2.   Monthly mean of rainfall in Hong Kong between 1971-2000

 

Table 3.   Monthly mean numbers of days with lightning, thunderstorm and fog reported at the Observatory
between 1971-2000

Month	Number of Days with Lightning	Number of Days with Thunderstorm	Number of Days with Fog (Visibility < 1000 m)
January	0.13	0.10	0.23
February	1.00	0.97	1.23
March	1.77	1.63	2.30
April	4.77	4.20	1.13
May	6.67	5.27	0.17
June	7.70	5.60	-
July	8.47	5.90	-
August	11.00	8.10	-
September	6.93	4.30	-
October	1.13	0.80	-
November	0.23	0.23	-
December	-	-	0.03
Year	49.80	37.10	5.09

Figure 3.    Monthly mean numbers of days with lightning, thunderstorm and fog reported at the Observatory between 1971-2000

 

 

Figure 4.   Monthly means of daily maximum, mean and minimum temperature recorded at the Observatory between 1971-2000

 

Figure 5.1.    Monthly mean of relative humidity recorded at the Observatory between 1971-2000

Figure 5.2.    Monthly means of dew point temperature, web-bulb temperature and vapour pressure recorded at the Observatory between 1971-2000

 

  

Figure 6.1.    Monthly mean of cloud amount recorded at the Observatory between 1971-2000

Figure 6.2.    Monthly mean of sunshine duration recorded at King's Park between 1971-2000

 

 

Figure 7.   Monthly means of prevailing wind direction and mean wind speed recorded at the Observatory and Waglan Island between 1971-2000

 

Figure8.   Monthly mean of atmospheric pressure recorded at the Observatory between 1971-2000

 

*   1975 - 2004

Figure9.1.   Monthly Sea Surface Temperature Recorded at North Point between 1975-2004 and Waglan Island between 1971-2000

 

Figure9.2.   Monthly means of evaporation and potential evapotranspiration recorded at King's Park between 1971-2000