Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition from August to September brings an average high-temperature of a still hot 30°C (86°F), barely different from August's 31.3°C (88.3°F). Chung Sam Wai records a slight downturn in temperature to an average of 26.4°C (79.5°F) during September nights.Heat index
Throughout September, the heat index is calculated to be a sweltering 37°C (98.6°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In September, the average relative humidity is 76%.Rainfall
In September, in Chung Sam Wai, Hong Kong, the rain falls for 22.7 days. Throughout September, 150mm (5.91") of precipitation is accumulated. Throughout the year, in Chung Sam Wai, Hong Kong, there are 207.6 rainfall days, and 1194mm (47.01") of precipitation is accumulated.Daylight
In September, the average length of the day in Chung Sam Wai, Hong Kong, is 12h and 17min.On the first day of September in Chung Sam Wai, sunrise is at 06:06 and sunset at 18:41. On the last day of the month, sunrise is at 06:15 and sunset at 18:12 HKT.
Sunshine
In Chung Sam Wai, Hong Kong, the average sunshine in September is 8.2h.UV index
The months with the highest UV index in Chung Sam Wai are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 7 during September, leads to the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
How hot is September in Chung Sam Wai?
What is the average humidity in September in Chung Sam Wai?
How much does it rain in Chung Sam Wai in September?
What is the average length of the day in September in Chung Sam Wai?
When is the sunrise / sunset in September in Chung Sam Wai?
How long on average sun shines in September in Chung Sam Wai?
What is the month with the highest UV index in Chung Sam Wai?
How high is the UV index in September in Chung Sam Wai?
Average temperature in September
Chung Sam Wai, Hong Kong
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (18.8°C).
- Average low temperature in September: 26.4°C
The months with the highest average low temperature are July and August (27.3°C).
The coldest month (with the lowest average low temperature) is January (14.6°C).
Average pressure in September
Chung Sam Wai, Hong Kong
- Average pressure in September: 1008.4mbar
The month with the highest atmospheric pressure is January (1020.4mbar).
The month with the lowest atmospheric pressure is August (1004.7mbar).
Average wind speed in September
Chung Sam Wai, Hong Kong
- Average wind speed in September: 12.1km/h
The windiest month (with the highest average wind speed) is December (14.2km/h).
The calmest month (with the lowest average wind speed) is August (11.8km/h).
Average humidity in September
Chung Sam Wai, Hong Kong
- Average humidity in September: 76%
The month with the highest relative humidity is May (83%).
The month with the lowest relative humidity is December (68%).
Average rainfall in September
Chung Sam Wai, Hong Kong
- Average rainfall in September: 150mm
The wettest month (with the highest rainfall) is August (215mm).
The driest month (with the least rainfall) is December (19mm).
Average rainfall days in September
Chung Sam Wai, Hong Kong
- Average rainfall days in September: 22.7 days
The month with the highest number of rainy days is July (25.3 days).
The month with the least rainy days is December (8.7 days).
Average daylight in September /
Average sunshine in September
Chung Sam Wai, Hong Kong
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are March and December (Average sunshine: 5h and 18min).
Average sunshine days in September
Chung Sam Wai, Hong Kong
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is December (20.2 days).
The month with the least sunshine days is June (4.1 days).
Average UV index in September
Chung Sam Wai, Hong Kong
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Chung Sam Wai, Hong Kong
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is October (Cloud cover 36).
Average visibility in September
Chung Sam Wai, Hong Kong
- Average visibility in September: 10km
The months with the highest visibility are January, February, July, September, October, November and December (10km).
The months with the lowest visibility are March, April, May, June and August (9km).
Chung Sam Wai, Hong Kong
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