EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, SEPTEMBER 1999
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
SEPTEMBER 1999
| Date SEPTEMBER |
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 | 1010.8 | 31.2 | 27.7 | 25.4 | 24.6 | 84 | 79 | 11.5 |
| 2 | 1008.7 | 32.1 | 28.5 | 26.4 | 24.1 | 77 | 71 | 1.1 |
| 3 | 1005.1 | 32.8 | 28.9 | 26.8 | 23.8 | 75 | 69 | - |
| 4 | 1004.8 | 30.9 | 28.9 | 27.4 | 24.0 | 75 | 85 | Trace |
| 5 | 1007.6 | 29.5 | 28.2 | 27.1 | 25.8 | 87 | 80 | 3.8 |
| 6 | 1007.8 | 31.8 | 29.0 | 27.3 | 25.8 | 83 | 71 | Trace |
| 7 | 1008.2 | 31.1 | 29.2 | 27.4 | 25.7 | 82 | 59 | Trace |
| 8 | 1009.5 | 30.3 | 28.5 | 26.4 | 25.2 | 83 | 77 | 3.9 |
| 9 | 1008.3 | 30.3 | 28.3 | 27.0 | 24.4 | 79 | 62 | 0.5 |
| 10 | 1007.3 | 32.1 | 29.1 | 27.0 | 24.3 | 76 | 52 | Trace |
| 11 | 1005.9 | 32.6 | 29.7 | 27.8 | 24.5 | 75 | 39 | - |
| 12 | 1004.3 | 32.5 | 29.8 | 27.9 | 25.2 | 77 | 72 | Trace |
| 13 | 1002.1 | 32.5 | 29.7 | 27.8 | 25.7 | 79 | 86 | 1.4 |
| 14 | 998.8 | 32.8 | 30.2 | 27.6 | 24.0 | 70 | 81 | 0.4 |
| 15 | 995.8 | 31.1 | 29.0 | 27.3 | 23.3 | 71 | 90 | 1.4 |
| 16 | 987.1 | 27.4 | 25.2 | 23.8 | 23.6 | 91 | 100 | 276.0 |
| 17 | 1002.0 | 28.4 | 27.2 | 24.7 | 24.3 | 84 | 93 | 5.0 |
| 18 | 1005.3 | 31.6 | 28.4 | 26.8 | 24.1 | 78 | 82 | Trace |
| 19 | 1006.8 | 29.8 | 27.7 | 26.4 | 25.1 | 86 | 75 | 15.4 |
| 20 | 1007.5 | 29.5 | 27.0 | 24.6 | 24.6 | 87 | 61 | 4.3 |
| 21 | 1008.8 | 29.9 | 26.9 | 25.2 | 21.5 | 73 | 73 | Trace |
| 22 | 1009.1 | 29.3 | 26.1 | 23.6 | 17.3 | 58 | 16 | - |
| 23 | 1010.1 | 29.3 | 26.2 | 23.0 | 18.2 | 62 | 10 | - |
| 24 | 1010.9 | 29.7 | 26.6 | 23.7 | 18.7 | 63 | 47 | - |
| 25 | 1009.9 | 27.2 | 25.7 | 23.7 | 19.5 | 69 | 84 | 1.4 |
| 26 | 1008.9 | 25.9 | 24.8 | 22.8 | 22.1 | 85 | 91 | 26.7 |
| 27 | 1011.8 | 30.4 | 26.7 | 24.2 | 23.5 | 83 | 88 | 6.4 |
| 28 | 1012.9 | 28.5 | 26.8 | 25.4 | 24.4 | 87 | 90 | 6.5 |
| 29 | 1013.1 | 30.4 | 27.8 | 26.1 | 24.0 | 80 | 72 | - |
| 30 | 1012.7 | 29.9 | 27.3 | 25.7 | 23.0 | 78 | 36 | - |
| Mean/Total | 1006.7 | 30.4 | 27.8 | 25.9 | 23.5 | 78 | 70 | 365.7 |
| Normal | 1008.8 | 30.3 | 27.6 | 25.5 | 23.3 | 78 | 63 | 299.7 |
| Station | Hong Kong Observatory | |||||||
| Date SEPTEMBER |
Total Bright Sunshine (hours) |
Daily Global Solar Radiation (MJ/m2) |
Total Evaporation (mm) |
Prevailing Wind Direction (degrees) |
Mean Wind Speed (km/h) |
|---|---|---|---|---|---|
| 1 | 4.2 | 12.54 | 4.8 | 030 | 5.7 |
| 2 | 7.7 | 15.64 | 3.1 | 020 | 4.7 |
| 3 | 6.5 | 15.52 | 4.5 | 020 | 9.3 |
| 4 | 0.4 | 8.47 | 2.4 | 100 | 12.8 |
| 5 | 1.8 | 9.46 | 2.6 | 090 | 11.3 |
| 6 | 10.3 | 23.70 | 5.3 | 100 | 17.5 |
| 7 | 10.7 | 22.53 | 5.3 | 120 | 16.9 |
| 8 | 7.1 | 15.09 | 3.5 | 160 | 8.7 |
| 9 | 5.0 | 10.78 | 2.3 | 210 | 6.3 |
| 10 | 8.8 | 19.86 | 5.0 | 220 | 7.8 |
| 11 | 10.3 | 22.61 | 5.6 | 240 | 11.3 |
| 12 | 6.0 | 14.35 | 4.7 | 290 | 8.8 |
| 13 | 2.1 | 11.02 | 4.0 | 060 | 10.6 |
| 14 | 1.5 | 11.91 | 4.6 | 360 | 15.2 |
| 15 | - | 7.63 | 6.2 | 360 | 48.9 |
| 16 | - | 1.19 | 6.4 | 190 | 87.4 |
| 17 | - | 5.21 | 2.1 | 190 | 28.3 |
| 18 | 4.4 | 15.08 | 3.7 | 190 | 16.0 |
| 19 | 2.1 | 9.10 | 4.0 | 130 | 5.8 |
| 20 | 2.1 | 8.66 | 3.2 | 170 | 9.8 |
| 21 | 5.0 | 14.49 | 4.8 | 010 | 33.6 |
| 22 | 10.3 | 20.47 | 5.8 | 010 | 32.3 |
| 23 | 10.3 | 20.97 | 4.9 | 010 | 24.7 |
| 24 | 8.3 | 18.73 | 4.4 | 070 | 34.4 |
| 25 | 0.2 | 5.04 | 3.4 | 010 | 35.7 |
| 26 | - | 2.53 | 2.6 | 110 | 38.6 |
| 27 | 4.7 | 15.14 | 3.3 | 080 | 33.0 |
| 28 | 2.4 | 8.10 | 2.7 | 090 | 34.9 |
| 29 | 6.6 | 15.77 | 3.3 | 080 | 22.0 |
| 30 | 9.7 | 20.25 | 4.5 | 090 | 19.2 |
| Mean/Total | 148.5 | 13.39 | 123.0 | 010 | 21.7 |
| Normal | 181.7 | 16.49 | 150.3 | 090 | 21.9 |
| Station | King's Park | Waglan Island^ | |||
The minimum pressure recorded at the Hong Kong Observatory was 976.1 hectopascals at 0809 HKT on 16 September.
The maximum air temperature recorded at the Hong Kong Observatory was 32.8 degrees C at 1241 HKT on 3 September and at 1335 HKT on 14 September.
The minimum air temperature recorded at the Hong Kong Observatory was 22.8 degrees C at 1042 HKT on 26 September.
The maximum gust peak speed recorded at Waglan Island was 234 kilometres per hour from 020 degrees at 0514 HKT on 16 September.
The maximum instantaneous rate of rainfall recorded at King's Park was 180 millimetres per hour at 0504 HKT on 16 September.
^ 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.