EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, JULY 1999
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
JULY 1999
| 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 | 1005.0 | 31.6 | 29.3 | 27.9 | 24.8 | 77 | 86 | 0.2 |
| 2 | 1004.9 | 32.3 | 29.4 | 26.3 | 25.0 | 78 | 74 | 9.0 |
| 3 | 1006.7 | 30.9 | 28.3 | 26.2 | 25.3 | 84 | 86 | 8.0 |
| 4 | 1007.5 | 28.9 | 26.8 | 25.4 | 24.9 | 89 | 85 | 5.0 |
| 5 | 1006.3 | 30.4 | 27.0 | 25.5 | 24.2 | 85 | 86 | 16.3 |
| 6 | 1006.9 | 29.3 | 26.7 | 25.1 | 24.1 | 86 | 87 | 14.2 |
| 7 | 1006.2 | 29.7 | 27.7 | 25.6 | 24.9 | 85 | 88 | 2.7 |
| 8 | 1004.8 | 29.7 | 28.0 | 23.8 | 25.1 | 84 | 90 | 32.2 |
| 9 | 1003.7 | 29.2 | 28.2 | 25.6 | 25.3 | 85 | 88 | 21.5 |
| 10 | 1002.9 | 30.9 | 29.3 | 27.9 | 25.3 | 79 | 86 | 0.3 |
| 11 | 1002.8 | 32.0 | 29.6 | 28.4 | 25.1 | 77 | 84 | Trace |
| 12 | 1002.4 | 32.2 | 29.7 | 28.4 | 25.4 | 78 | 83 | - |
| 13 | 1002.1 | 32.1 | 29.3 | 26.1 | 25.7 | 82 | 86 | 41.8 |
| 14 | 1003.4 | 32.9 | 30.0 | 26.3 | 25.5 | 77 | 81 | 2.3 |
| 15 | 1003.8 | 32.2 | 29.5 | 26.7 | 25.5 | 79 | 83 | 5.5 |
| 16 | 1004.3 | 32.2 | 29.6 | 27.9 | 25.5 | 79 | 87 | 2.0 |
| 17 | 1006.1 | 31.5 | 29.6 | 27.8 | 25.6 | 79 | 82 | 6.3 |
| 18 | 1005.4 | 30.6 | 29.3 | 28.1 | 25.8 | 82 | 88 | 2.3 |
| 19 | 1004.1 | 32.6 | 29.8 | 28.3 | 26.2 | 81 | 86 | Trace |
| 20 | 1003.6 | 33.0 | 30.1 | 28.5 | 26.1 | 79 | 81 | Trace |
| 21 | 1003.0 | 32.7 | 30.4 | 28.6 | 26.4 | 79 | 80 | - |
| 22 | 1002.2 | 32.3 | 30.0 | 28.2 | 26.2 | 80 | 78 | Trace |
| 23 | 1000.3 | 32.8 | 30.0 | 28.3 | 26.0 | 79 | 74 | 2.3 |
| 24 | 998.4 | 33.7 | 30.5 | 28.3 | 26.1 | 78 | 65 | 0.6 |
| 25 | 997.6 | 32.4 | 30.0 | 28.5 | 25.1 | 75 | 80 | 0.8 |
| 26 | 995.5 | 30.9 | 28.3 | 26.3 | 25.1 | 83 | 89 | 25.8 |
| 27 | 995.7 | 30.3 | 28.0 | 25.8 | 24.6 | 82 | 90 | 4.4 |
| 28 | 999.2 | 33.0 | 29.6 | 27.4 | 25.3 | 78 | 73 | Trace |
| 29 | 1001.9 | 32.4 | 29.8 | 27.9 | 26.0 | 81 | 63 | - |
| 30 | 1003.5 | 32.7 | 30.0 | 28.5 | 26.1 | 80 | 73 | - |
| 31 | 1003.9 | 31.9 | 29.8 | 28.7 | 26.1 | 81 | 86 | 0.3 |
| Mean/Total | 1003.0 | 31.6 | 29.2 | 27.2 | 25.4 | 81 | 82 | 203.8 |
| 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 | 7.8 | 17.92 | 4.5 | 220 | 12.3 |
| 2 | 8.3 | 19.19 | 4.7 | 190 | 12.3 |
| 3 | 4.1 | 15.07 | 2.9 | 170 | 11.9 |
| 4 | 0.2 | 7.81 | 2.2 | 190 | 12.5 |
| 5 | 5.4 | 16.23 | 3.4 | 200 | 20.0 |
| 6 | 2.2 | 12.11 | 4.3 | 240 | 19.2 |
| 7 | - | 9.53 | 2.6 | 230 | 26.3 |
| 8 | 0.4 | 5.28 | 4.7 | 220 | 28.0 |
| 9 | - | 3.57 | 3.3 | 220 | 24.4 |
| 10 | 4.6 | 13.95 | 3.5 | 210 | 23.8 |
| 11 | 4.4 | 15.67 | 4.4 | 220 | 20.7 |
| 12 | 6.8 | 18.19 | 5.8 | 200 | 16.2 |
| 13 | 7.8 | 16.60 | 4.3 | 190 | 14.0 |
| 14 | 7.4 | 17.93 | 4.6 | 190 | 11.1 |
| 15 | 4.6 | 16.28 | 4.2 | 200 | 12.6 |
| 16 | 4.9 | 15.70 | 4.6 | 190 | 20.4 |
| 17 | 6.3 | 13.26 | 4.2 | 220 | 24.0 |
| 18 | 0.8 | 13.51 | 3.8 | 240 | 30.6 |
| 19 | 7.4 | 18.71 | 4.8 | 230 | 30.5 |
| 20 | 5.7 | 19.13 | 4.9 | 240 | 24.8 |
| 21 | 8.7 | 23.66 | 5.2 | 240 | 18.0 |
| 22 | 4.3 | 14.79 | 3.4 | 020 | 9.1 |
| 23 | 4.5 | 12.61 | 3.6 | 060 | 15.4 |
| 24 | 8.6 | 19.97 | 6.2 | 070 | 22.5 |
| 25 | 6.5 | 19.17 | 5.7 | 070 | 37.8 |
| 26 | 2.3 | 11.80 | 3.5 | 050 | 55.5 |
| 27 | - | 5.31 | 1.8 | 260 | 31.2 |
| 28 | 6.5 | 18.35 | 4.8 | 230 | 18.7 |
| 29 | 9.3 | 20.50 | 5.3 | 130 | 11.9 |
| 30 | 10.4 | 22.82 | 5.8 | 090 | 15.5 |
| 31 | 7.8 | 19.83 | 3.6 | 090 | 17.0 |
| Mean/Total | 158.0 | 15.30 | 130.6 | 220 | 20.9 |
| 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 993.0 hectopascals at 1650 HKT on 26 July.
The maximum air temperature recorded at the Hong Kong Observatory was 33.7 degrees C at 1324 HKT on 24 July.
The minimum air temperature recorded at the Hong Kong Observatory was 23.8 degrees C at 1047 HKT on 8 July.
The maximum gust peak speed recorded at Waglan Island was 92 kilometres per hour from 050 degrees at 1653 HKT on 26 July.
The maximum instantaneous rate of rainfall recorded at King's Park was 150 millimetres per hour at 1225 HKT on 9 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.