EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, JULY 1998
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
JULY 1998
| Date JULY |
Mean Pressure (hPa) |
Air Temperature | Mean Dew Point Temperature (deg. C) |
Mean Relative Humidity (%) |
Mean Amount of Cloud (%) |
Total Rainfall (mm) | ||
|---|---|---|---|---|---|---|---|---|
| Maximum (deg. C) |
Mean (deg. C) |
Minimum (deg. C) | ||||||
| 1 | 1010.5 | 32.3 | 29.3 | 26.0 | 25.1 | 78 | 81 | 9.5 |
| 2 | 1010.8 | 29.4 | 26.7 | 24.6 | 24.8 | 90 | 82 | 38.7 |
| 3 | 1011.6 | 27.9 | 26.2 | 24.4 | 24.5 | 90 | 92 | 42.5 |
| 4 | 1012.5 | 29.1 | 25.6 | 23.7 | 23.9 | 91 | 89 | 51.3 |
| 5 | 1011.4 | 29.6 | 26.6 | 24.4 | 24.7 | 90 | 87 | 0.7 |
| 6 | 1010.6 | 28.8 | 26.1 | 25.0 | 24.6 | 92 | 90 | 11.4 |
| 7 | 1009.0 | 30.3 | 27.3 | 25.6 | 24.5 | 85 | 82 | Trace |
| 8 | 1007.7 | 30.8 | 27.6 | 25.4 | 24.6 | 84 | 75 | 1.8 |
| 9 | 1007.0 | 30.5 | 28.2 | 26.2 | 24.6 | 81 | 84 | Trace |
| 10 | 1005.7 | 32.5 | 29.1 | 26.5 | 25.1 | 80 | 49 | - |
| 11 | 1004.1 | 31.2 | 29.4 | 27.6 | 25.1 | 78 | 82 | - |
| 12 | 1003.6 | 30.2 | 28.9 | 27.0 | 25.8 | 84 | 86 | 9.0 |
| 13 | 1007.3 | 29.4 | 26.3 | 24.0 | 24.2 | 89 | 90 | 80.8 |
| 14 | 1009.5 | 32.0 | 29.5 | 25.7 | 25.6 | 80 | 81 | 2.0 |
| 15 | 1009.2 | 32.4 | 30.0 | 28.1 | 25.5 | 77 | 58 | Trace |
| 16 | 1006.9 | 32.3 | 30.0 | 28.6 | 25.5 | 77 | 60 | Trace |
| 17 | 1005.9 | 32.0 | 30.1 | 28.7 | 25.9 | 79 | 66 | Trace |
| 18 | 1006.5 | 31.9 | 30.1 | 28.8 | 26.0 | 79 | 86 | Trace |
| 19 | 1005.7 | 32.2 | 30.1 | 29.0 | 25.8 | 78 | 83 | - |
| 20 | 1004.7 | 32.6 | 30.3 | 28.9 | 25.5 | 76 | 82 | Trace |
| 21 | 1004.7 | 32.2 | 30.2 | 27.7 | 25.8 | 77 | 85 | 12.1 |
| 22 | 1005.3 | 32.6 | 30.3 | 29.2 | 25.2 | 74 | 84 | 0.6 |
| 23 | 1004.7 | 31.8 | 30.2 | 29.1 | 25.7 | 77 | 86 | 0.5 |
| 24 | 1003.9 | 32.1 | 30.1 | 28.9 | 25.7 | 77 | 88 | 0.4 |
| 25 | 1005.0 | 32.7 | 30.3 | 29.3 | 25.6 | 76 | 79 | Trace |
| 26 | 1006.3 | 32.7 | 30.3 | 29.1 | 25.8 | 77 | 81 | Trace |
| 27 | 1007.3 | 33.2 | 30.2 | 28.1 | 25.8 | 78 | 59 | Trace |
| 28 | 1007.0 | 33.3 | 30.3 | 28.1 | 25.5 | 76 | 74 | 0.4 |
| 29 | 1007.1 | 32.4 | 30.1 | 27.7 | 25.2 | 76 | 81 | 1.6 |
| 30 | 1007.5 | 32.6 | 30.3 | 28.6 | 25.2 | 75 | 76 | Trace |
| 31 | 1008.5 | 32.9 | 30.3 | 27.4 | 25.3 | 76 | 53 | 3.9 |
| Mean/Total | 1007.3 | 31.5 | 29.0 | 27.1 | 25.2 | 80 | 78 | 267.2 |
| Normal | 1005.3 | 31.5 | 28.8 | 26.6 | 24.9 | 80 | 65 | 323.5 |
| Station | Hong Kong Observatory | |||||||
| Date JULY |
Total Bright Sunshine (hours) |
Daily Global Solar Radiation (MJ/m2) |
Total Evaporation (mm) |
Prevailing Wind Direction (degrees) |
Mean Wind Speed (km/h) |
|---|---|---|---|---|---|
| 1 | 8.0 | 17.90 | 5.5 | 170 | 18.0* |
| 2 | 1.0 | 6.52 | 3.2 | 120 | 16.5* |
| 3 | - | 2.58 | 3.2 | 120 | 15.0* |
| 4 | 2.1 | 9.91 | 2.2 | 110 | 18.1* |
| 5 | 2.3 | 11.19 | 2.1 | 110 | 13.7* |
| 6 | 2.5 | 11.63 | 2.5 | 120 | 19.1* |
| 7 | 6.8 | 20.61 | 4.0 | 120 | 17.3* |
| 8 | 5.7 | 18.79 | 4.2 | 130 | 17.3* |
| 9 | 4.0 | 14.56 | 3.2 | 260 | 10.0* |
| 10 | 11.6 | 25.06 | 5.1 | 250 | 17.1* |
| 11 | 3.2 | 14.47 | 3.7 | 260 | 21.2 |
| 12 | - | 8.14 | 2.9 | 270 | 19.7 |
| 13 | 2.0 | 12.41 | 3.4 | 190 | 19.4 |
| 14 | 8.4 | 20.62 | 5.3 | 200 | 27.7 |
| 15 | 10.4 | 23.24 | 5.5 | 230 | 26.2 |
| 16 | 11.6 | 24.57 | 6.0 | 240 | 32.2 |
| 17 | 11.5 | 23.32 | 6.4 | 240 | 34.2 |
| 18 | 9.8 | 20.94 | 6.0 | 240 | 37.0 |
| 19 | 10.2 | 20.72 | 5.7 | 240 | 35.8 |
| 20 | 11.2 | 22.86 | 6.2 | 230 | 30.1 |
| 21 | 7.8 | 17.66 | 6.0 | 220 | 27.9 |
| 22 | 9.0 | 20.17 | 5.6 | 220 | 29.8 |
| 23 | 7.3 | 19.80 | 5.4 | 220 | 32.1 |
| 24 | 5.7 | 18.01 | 5.5 | 220 | 32.4 |
| 25 | 8.7 | 15.75 | 4.9 | 210 | 22.3 |
| 26 | 7.3 | 17.60 | 4.4 | 210 | 16.9 |
| 27 | 11.0 | 25.21 | 6.6 | 230 | 19.2 |
| 28 | 11.3 | 23.95 | 6.2 | 230 | 25.7 |
| 29 | 9.8 | 23.76 | 6.6 | 230 | 23.0 |
| 30 | 10.1 | 22.57 | 6.6 | 220 | 22.7 |
| 31 | 11.8 | 24.19 | 6.3 | 230 | 23.2 |
| Mean/Total | 222.1 | 18.02 | 150.4 | 230 | 23.2 |
| Normal | 231.1 | 19.15 | 171.6 | 230 | 20.0 |
| Station | King's Park | Waglan Island^ | |||
The minimum pressure recorded at the Hong Kong Observatory was 1001.9 hectopascals at 1733 HKT on 11 July.
The maximum air temperature recorded at the Hong Kong Observatory was 33.3 degrees C at 1414 HKT on 28 July.
The minimum air temperature recorded at the Hong Kong Observatory was 23.7 degrees C at 1850 HKT on 4 July.
The maximum gust peak speed recorded at Cheung Chau was 92 kilometres per hour from 190 degrees at 1805 HKT on 1 July.
The maximum instantaneous rate of rainfall recorded at King's Park was 186 millimetres per hour at 1134 HKT on 3 July.
^ In case the data are not available from Waglan Island, observations of Cheung Chau or other nearby weather stations will be incorporated in computing the Prevailing Wind Direction and Mean Wind Speed.
* Wind data from Cheung Chau were used for 1-10 July due to malfunction of the anemometer at Waglan Island.