 |
Monthly Normals and Extreme Values for Hong Kong in May
Monthly Normals of Meteorological Elements for May 1981-2010,
with Extreme Values between 1884-1939 and 1947-2011 for Hong Kong
| Meteorological Elements |
Date on which
extreme value
was recorded |
ATMOSPHERIC
PRESSURE |
Absolute Maximum |
1020.2 |
hPa |
1/5/1934 |
| Mean |
1009.3 |
hPa |
|
| Absolute Minimum |
981.1 |
hPa |
19/5/1961 |
| Mean Diurnal Range |
3.5 |
hPa |
|
| AIR TEMPERATURE |
Absolute Maximum |
35.5 |
deg. C |
31/5/1963 |
| Mean Daily Maximum |
28.4 |
deg. C |
|
| Mean |
25.9 |
deg. C |
|
| Mean Daily Minimum |
24.1 |
deg. C |
|
| Absolute Minimum |
15.4 |
deg. C |
1/5/1917 |
| RELATIVE HUMIDITY |
Mean |
83 |
% |
|
| Absolute Minimum |
23 |
% |
14/5/1955
4/5/1961 |
| AMOUNT OF CLOUD |
76 |
% |
|
| RAINFALL |
Total |
304.7 |
mm |
|
| Duration |
106 |
hours |
|
Number of
Days with |
0.1 mm
or above |
14.67 |
|
|
25.0 mm
or above |
3.97 |
|
|
50.0 mm
or above |
1.73 |
|
|
| Maximum Hourly |
109.9 |
mm |
8/5/1992 |
| Maximum Daily |
520.6 |
mm |
30/5/1889 |
| Maximum Monthly |
1241.1 |
mm |
1889 |
| NUMBER OF DAYS WITH THUNDERSTORM |
5.20 |
|
|
| NUMBER OF DAYS WITH FOG (Visibility < 1000 m) |
0.07 |
|
|
SOIL TEMPERATURE
AT 0700 HOURS |
0.5 m |
26.6 |
deg. C |
|
| 1.0 m |
25.6 |
deg. C |
|
BRIGHT SUNSHINE
AT KING'S PARK |
Duration |
140.4 |
hours |
|
| Percentage of Possible |
34 |
% |
|
WIND
AT WAGLAN ISLAND |
Prevailing Direction |
080 |
degrees |
|
| Mean Speed |
19.7 |
km/h |
|
| Maximum Gust # |
140 |
km/h |
28/5/1964 |
SEA SURFACE TEMPERATURE
AT NORTH POINT AT 0700 HOURS |
24.5 |
deg. C |
|
Note : All measurements were made at the Hong Kong Observatory except where specified.
# 1953 - 2011
|
