We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: 1 are based on computer models that may have model-based errors, 2 are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and 3 have particular difficulty with the weather in some coastal areas, especially small islands.
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History: The daily average high red line and low blue line temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight. Compare Hong Kong to another city:. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed both rain and snow fell in the same day.
The average rainfall solid line accumulated over the course of a sliding day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
The number of hours during which the Sun is visible black line. From bottom most yellow to top most gray , the color bands indicate: full daylight, twilight civil, nautical, and astronomical , and full night.
The solar day over the course of April. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. Temperature In April, the average high-temperature slightly increases, from a pleasant In April, in Hong Kong, the average low-temperature is Rainfall In Hong Kong, during April, the rain falls for 12 days and regularly aggregates up to Throughout the year, there are Sea temperature In Hong Kong, the average water temperature is Note : Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in Daylight The average length of the day in Hong Kong is Sunshine The average sunshine in April is 3.
A UV Index of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV rays for the average person. Note : The daily maximum UV index of 12 in April interpret into the following advice: Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The accumulated rainfall recorded in the first four months of the year was Under the influence of the northeast monsoon and the subsequent fresh to strong easterly airstream, it was cloudy with a few rain patches on 1 - 4 April.
With the strengthening of the easterlies and the setting in of an upper-air disturbance, local weather became cooler with more showers on 5 — 6 April. More than 20 millimetres of rainfall were generally recorded over the territory, rainfall even exceeded 40 millimetres over parts of the New Territories on these two days. The temperature at the Observatory dropped to With the departure of the upper-air disturbance, showers over Hong Kong eased off gradually and there were bright periods during the day on 7 April.
Under the influence of a relatively dry easterly airstream and the setting in of a ridge of high pressure, the cloud band covering Hong Kong thinned out and the weather became generally fine and dry in the next few days. The weather turned cloudier again on 11 April with the approach of a cold front. The cold front moved across the coastal areas of Guangdong and brought showery weather to the region on the night of 11 April. Luckily, there is widespread use of air conditioning.
In the hills around the city and in the districts overlooking the sea, at least the breeze blows. In July, there is often a pause, a period of good weather lasting a week or two. The probability of typhoons, which bring heavy rains and strong winds for a few days, with the risk of flooding and landslides, is highest in this season.
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