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    EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, AUGUST 2015

    EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
    AUGUST 2015 (Table 1)

    Date
    August
    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 1011.2 32.2 28.9 26.9 24.6 78 69 -
    2 1011.6 32.3 28.9 26.8 24.5 78 54 -
    3 1010.6 33.3 29.5 27.3 24.5 75 38 -
    4 1008.3 33.3 29.4 26.8 24.1 74 29 -
    5 1006.1 33.3 29.6 27.6 24.4 74 27 -
    6 1005.3 33.1 30.1 27.8 24.2 72 29 -
    7 1003.4 33.3 30.7 28.2 24.9 72 40 -
    8 998.5 36.3 32.4 30.0 24.0 62 55 -
    9 998.5 34.7 31.0 26.9 24.8 71 80 11.6
    10 1004.5 30.6 28.1 25.1 25.2 85 88 23.5
    11 1007.3 32.8 29.2 26.3 25.4 81 77 16.8
    12 1007.9 33.7 30.0 27.8 25.8 79 78 Trace
    13 1007.9 29.6 28.0 26.4 25.6 87 84 27.5
    14 1007.4 28.8 26.9 25.6 25.1 90 88 18.9
    15 1008.5 28.6 27.0 24.9 25.0 89 88 24.6
    16 1008.5 31.2 29.2 26.9 26.5 86 88 0.1
    17 1008.2 32.4 29.9 28.3 26.6 83 81 Trace
    18 1008.0 33.8 30.2 28.4 25.8 78 67 Trace
    19 1007.7 32.8 30.1 28.1 25.7 77 59 -
    20 1006.3 31.2 29.1 26.8 26.1 84 67 6.1
    21 1002.2 33.4 30.0 26.9 25.5 77 70 -
    22 1000.1 32.0 30.2 28.4 24.4 71 48 Trace
    23 1000.0 32.9 30.6 28.0 24.2 69 30 3.4
    24 1002.4 33.2 30.7 28.3 24.3 70 48 -
    25 1005.5 34.4 30.6 27.9 23.2 65 22 -
    26 1008.1 31.7 28.9 27.8 25.3 81 78 0.2
    27 1008.1 32.4 29.0 27.0 25.0 79 75 -
    28 1006.5 31.2 28.3 26.9 24.4 79 84 Trace
    29 1006.2 29.6 27.8 26.5 24.8 84 87 0.9
    30 1006.8 27.9 26.6 25.8 25.2 92 88 9.7
    31 1007.4 29.0 27.4 25.8 25.0 87 88 Trace
    Mean/Total 1006.1 32.1 29.3 27.2 25.0 78 65 143.3
    Normal* 1005.2 31.1 28.6 26.6 25.0 81 69 432.2
    Station Hong   Kong   Observatory

    EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
    AUGUST 2015 (Table 2)

    Date
    August
    Number of hours
    of Reduced
    Visibility#
    (hours)
    Total
    Bright
    Sunshine
    (hours)
    Daily
    Global Solar
    Radiation
    (MJ/m2)
    Total
    Evaporation
    (mm)
    Prevailing
    Wind
    Direction
    (degrees)
    Mean
    Wind
    Speed
    (km/h)
    1 0 10.7 24.94 6.4 020 11.8
    2 0 11.4 27.21 6.5 100 9.8
    3 0 10.3 26.46 5.3 020 5.5
    4 0 5.7 16.08 5.5 010 4.4
    5 0 10.8 26.58 7.5 220 8.7
    6 0 10.6 24.56 7.1 220 6.1
    7 3 10.0 20.82 7.7 290 10.9
    8 1 10.8 23.58 8.1 290 17.2
    9 0 10.0 23.29 6.5 220 26.4
    10 0 0.6 9.04 6.4 230 20.2
    11 0 6.5 20.23 5.2 220 13.9
    12 0 9.1 22.94 5.3 220 11.9
    13 0 0.1 5.79 3.3 230 22.9
    14 0 0.2 4.29 3.1 210 12.9
    15 0 0.3 3.30 N.A. 220 14.2
    16 0 0.2 8.59 2.8 230 18.1
    17 0 8.4 23.23 3.0 230 20.5
    18 0 10.2 25.92 6.5 220 18.1
    19 0 10.4 25.70 7.1 230 16.6
    20 1 5.0 11.82 3.9 270 7.0
    21 1 7.7 19.97 6.8 350 13.6
    22 0 6.1 15.82 4.1 010 12.0
    23 1 7.6 19.01 4.4 220 11.7
    24 4 7.8 19.49 6.3 010 11.0
    25 1 9.1 18.80 3.4 010 10.7
    26 2 1.1 8.01 3.3 040 16.4
    27 0 6.7 19.39 5.1 200 12.0
    28 0 4.5 14.04 3.9 210 8.9
    29 0 3.1 9.00 2.3 230 11.0
    30 0 - 4.98 0.5 220 5.9
    31 0 0.9 9.78 2.9 040 5.7
    Mean/Total 14 195.9 17.18 150.2& 220 12.8
    Normal* 52.6§ 188.9 15.63 134.9 230 19.4
    StationHong   Kong
    International   Airport
    King's   Park Waglan   Island^

    The minimum pressure recorded at the Hong Kong Observatory was 995.5 hectopascals at 1635 HKT on 8 August.

    The maximum air temperature recorded at the Hong Kong Observatory was 36.3 degrees C at 1551 HKT on 8 August.

    The minimum air temperature recorded at the Hong Kong Observatory was 24.9 degrees C at 1106 HKT on 15 August.

    The maximum gust peak speed recorded at Waglan Island was 72 kilometres per hour from 280 degrees at 1027 HKT on 15 August.

    The maximum instantaneous rate of rainfall recorded at the Hong Kong Observatory was 200 millimetres per hour at 0807 HKT on 13 August.

    # Reduced visibility refers to visibility below 8 kilometres when there is no fog, mist or precipitation.

       - The visibility readings at the Hong Kong International Airport are based on hourly observations by professional meteorological observers in 2004 and before, and average readings over the 10-minute period before the clock hour of the visibility meter near the middle of the south runway from 2005 onwards. The change of the data source in 2005 is an improvement of the visibility assessment using instrumented observations following the international trend.

       - Before 10 October 2007, the number of hours of reduced visibility at the Hong Kong International Airport in 2005 and thereafter displayed in this web page was based on hourly visibility observations by professional meteorological observers. Since 10 October 2007, the data have been revised using the average visibility readings over the 10-minute period before the clock hour, as recorded by the visibility meter near the middle of the south runway.

    ^ 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.

    * 1981-2010 Climatological Normal, unless otherwise specified

    § 1997-2014 Mean value

    & Data incomplete

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