 |
Monthly Normals and Extreme Values for Hong Kong in August
Monthly Normals of Meteorological Elements for August 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 |
1016.3 |
hPa |
13/8/1969 |
| Mean |
1005.2 |
hPa |
|
| Absolute Minimum |
961.6 |
hPa |
2/8/1979 |
| Mean Diurnal Range |
3.5 |
hPa |
|
| AIR TEMPERATURE |
Absolute Maximum |
36.1 |
deg. C |
19/8/1900
18/8/1990 |
| Mean Daily Maximum |
31.1 |
deg. C |
|
| Mean |
28.6 |
deg. C |
|
| Mean Daily Minimum |
26.6 |
deg. C |
|
| Absolute Minimum |
21.6 |
deg. C |
3/8/1955 |
| RELATIVE HUMIDITY |
Mean |
81 |
% |
|
| Absolute Minimum |
41 |
% |
28/8/1900 |
| AMOUNT OF CLOUD |
69 |
% |
|
| RAINFALL |
Total |
432.2 |
mm |
|
| Duration |
97 |
hours |
|
Number of
Days with |
0.1 mm
or above |
16.93 |
|
|
25.0 mm
or above |
5.37 |
|
|
50.0 mm
or above |
2.47 |
|
|
| Maximum Hourly |
82.1 |
mm |
2/8/1979 |
| Maximum Daily |
334.2 |
mm |
16/8/1982 |
| Maximum Monthly |
1090.1 |
mm |
1995 |
| NUMBER OF DAYS WITH THUNDERSTORM |
8.33 |
|
|
| NUMBER OF DAYS WITH FOG (Visibility < 1000 m) |
0 |
|
|
SOIL TEMPERATURE
AT 0700 HOURS |
0.5 m |
30.0 |
deg. C |
|
| 1.0 m |
29.4 |
deg. C |
|
BRIGHT SUNSHINE
AT KING'S PARK |
Duration |
188.9 |
hours |
|
| Percentage of Possible |
47 |
% |
|
WIND
AT WAGLAN ISLAND |
Prevailing Direction |
230 |
degrees |
|
| Mean Speed |
19.4 |
km/h |
|
| Maximum Gust # |
209 |
km/h |
21/8/1968 |
SEA SURFACE TEMPERATURE
AT NORTH POINT AT 0700 HOURS |
26.6 |
deg. C |
|
Note : All measurements were made at the Hong Kong Observatory except where specified.
# 1953 - 2011
|
