EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, MAY 1997
EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
MAY 1997
| Date MAY |
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 | 1010.9 | 28.8 | 25.6 | 23.6 | 22.2 | 82 | 62 | 0.1 |
| 2 | 1010.6 | 30.4 | 27.0 | 24.7 | 22.5 | 77 | 47 | - |
| 3 | 1009.6 | 28.3 | 26.8 | 25.5 | 23.6 | 83 | 82 | Trace |
| 4 | 1009.3 | 26.6 | 24.7 | 22.5 | 22.9 | 90 | 93 | 37.9 |
| 5 | 1008.7 | 25.9 | 24.5 | 22.9 | 22.6 | 89 | 89 | 18.2 |
| 6 | 1008.2 | 27.3 | 25.4 | 23.9 | 22.6 | 85 | 89 | 16.7 |
| 7 | 1010.2 | 26.2 | 24.6 | 23.3 | 22.8 | 90 | 86 | 14.5 |
| 8 | 1010.3 | 27.8 | 25.4 | 23.1 | 24.0 | 92 | 95 | 56.6 |
| 9 | 1010.1 | 27.1 | 23.9 | 22.2 | 22.5 | 92 | 97 | 22.8 |
| 10 | 1009.6 | 24.4 | 23.0 | 21.9 | 21.8 | 93 | 96 | 45.0 |
| 11 | 1008.4 | 29.8 | 26.6 | 23.6 | 23.7 | 85 | 83 | Trace |
| 12 | 1008.6 | 30.2 | 27.9 | 26.6 | 24.5 | 82 | 84 | - |
| 13 | 1010.0 | 30.7 | 28.2 | 26.7 | 24.4 | 81 | 77 | Trace |
| 14 | 1010.1 | 31.5 | 28.4 | 26.6 | 23.9 | 77 | 64 | - |
| 15 | 1009.1 | 31.6 | 28.8 | 27.1 | 24.0 | 76 | 61 | - |
| 16 | 1007.8 | 31.8 | 28.9 | 25.0 | 24.3 | 77 | 77 | 11.8 |
| 17 | 1007.9 | 28.2 | 26.8 | 24.2 | 23.9 | 84 | 85 | 17.3 |
| 18 | 1007.0 | 30.4 | 28.2 | 24.9 | 25.1 | 83 | 81 | 26.3 |
| 19 | 1005.8 | 31.4 | 28.4 | 25.2 | 25.1 | 83 | 82 | 19.8 |
| 20 | 1007.2 | 28.8 | 26.5 | 25.0 | 22.8 | 80 | 89 | 0.5 |
| 21 | 1008.2 | 26.3 | 24.7 | 22.6 | 22.1 | 85 | 95 | 8.7 |
| 22 | 1009.0 | 24.1 | 23.4 | 22.6 | 21.6 | 90 | 98 | 2.6 |
| 23 | 1009.7 | 24.0 | 23.1 | 22.4 | 20.5 | 85 | 94 | 0.3 |
| 24 | 1009.7 | 25.9 | 23.3 | 21.3 | 19.6 | 80 | 85 | 0.8 |
| 25 | 1008.9 | 28.8 | 25.5 | 23.4 | 16.2 | 57 | 57 | - |
| 26 | 1008.2 | 29.5 | 25.6 | 23.0 | 17.5 | 62 | 7 | - |
| 27 | 1007.2 | 29.2 | 26.0 | 23.7 | 21.0 | 74 | 5 | - |
| 28 | 1005.9 | 28.9 | 26.3 | 24.4 | 22.2 | 78 | 37 | - |
| 29 | 1006.0 | 28.5 | 26.3 | 24.7 | 22.6 | 80 | 86 | - |
| 30 | 1007.7 | 28.9 | 26.5 | 25.0 | 23.1 | 82 | 82 | 0.9 |
| 31 | 1007.9 | 30.9 | 27.6 | 25.5 | 23.7 | 80 | 46 | - |
| Mean/Total | 1008.6 | 28.5 | 26.1 | 24.1 | 22.6 | 82 | 75 | 300.8 |
| Normal | 1009.1 | 28.7 | 25.9 | 23.9 | 22.6 | 83 | 74 | 316.7 |
| Station | Hong Kong Observatory | |||||||
| Date MAY |
Total Bright Sunshine (hours) |
Daily Global Solar Radiation (MJ/m2) |
Total Evaporation (mm) |
Prevailing Wind Direction (degrees) |
Mean Wind Speed (km/h) |
|---|---|---|---|---|---|
| 1 | 5.2 | 14.28 | 2.9 | 240 | 15.0 |
| 2 | 11.1 | 25.05 | 5.3 | 230 | 17.2 |
| 3 | 1.4 | 6.54 | 2.6 | 150 | 11.8 |
| 4 | - | 8.08 | 4.4 | 090 | 15.3 |
| 5 | - | 5.91 | 0.6 | 090 | 22.8 |
| 6 | 0.2 | 8.68 | 2.9 | 090 | 20.8 |
| 7 | 0.1 | 6.24 | 1.9 | 080 | 12.3 |
| 8 | 0.6 | 5.60 | 1.7 | 160 | 16.4 |
| 9 | 0.5 | 5.48 | 2.6 | 080 | 23.0 |
| 10 | 0.7 | 9.53 | 1.5 | 090 | 32.2 |
| 11 | 9.3 | 19.88 | 4.6 | 150 | 17.1 |
| 12 | 4.9 | 11.59 | 3.4 | 160 | 22.0 |
| 13 | 9.4 | 16.79 | 3.8 | 150 | 17.3 |
| 14 | 9.0 | 21.28 | 4.5 | 180 | 15.9 |
| 15 | 9.9 | 22.51 | 5.8 | 210 | 18.7 |
| 16 | 8.4 | 21.22 | 8.1 | 230 | 29.1 |
| 17 | 0.4 | 11.15 | 4.2 | 270 | 16.1 |
| 18 | 4.3 | 13.79 | 2.7 | 230 | 25.5 |
| 19 | 4.8 | 17.93 | 6.9 | 240 | 29.6 |
| 20 | 1.8 | 11.31 | 3.2 | 070 | 17.7 |
| 21 | 0.2 | 3.72 | 2.7 | 080 | 48.2 |
| 22 | - | 4.20 | 1.2 | 070 | 44.0 |
| 23 | - | 3.72 | 2.4 | 010 | 24.0 |
| 24 | 0.1 | 7.54 | 2.7 | 020 | 24.3 |
| 25 | 10.5 | 24.47 | 6.0 | 080 | 25.4 |
| 26 | 11.6 | 23.39 | 5.3 | 060 | 13.4 |
| 27 | 11.6 | 22.82 | 4.6 | 090 | 9.4 |
| 28 | 10.1 | 22.21 | 4.6 | 100 | 13.3 |
| 29 | 1.4 | 10.90 | 2.8 | 090 | 7.0 |
| 30 | 1.2 | 8.37 | 2.1 | 230 | 7.9 |
| 31 | 8.0 | 15.46 | 3.1 | 150 | 12.0 |
| Mean/Total | 136.7 | 13.21 | 111.1 | 080 | 20.1 |
| Normal | 153.8 | 16.12 | 137.7 | 090 | 19.2 |
| Station | King's Park | Waglan Island^ | |||
The minimum pressure recorded at the Royal Observatory was 1003.0 hectopascals at 1633 HKT on 19 May.
The maximum air temperature recorded at the Royal Observatory was 31.8 degrees C at 1442 HKT on 16 May.
The minimum air temperature recorded at the Royal Observatory was 21.3 degrees C at 0347 HKT on 24 May.
The maximum gust peak speed recorded at Waglan Island was 75 kilometres per hour from 080 degrees at 2310 HKT on 21 May and at 0006 HKT on 22 May.
The maximum instantaneous rate of rainfall recorded at King's Park was 171 millimetres per hour at 2348 HKT on 16 May.
^ 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.