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 snowfall in September
- Average snowfall 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
September's arrival signals a moderate reduction in the average high-temperature, easing from a tropical 33.3°C (91.9°F) in August to a warm 29°C (84.2°F). Changsha's nighttime temperature in September drops to an average of 20.3°C (68.5°F).Heat index
In September, the average heat index is calculated to be a hot 34°C (93.2°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
The average relative humidity in September is 75%.Rainfall
In Changsha, China, in September, it is raining for 12.9 days, with typically 46mm (1.81") of accumulated precipitation. In Changsha, during the entire year, the rain falls for 181.9 days and collects up to 1008mm (39.69") of precipitation.Snowfall
March through October are months without snowfall in Changsha.Daylight
The average length of the day in September in Changsha is 12h and 20min.On the first day of the month, sunrise is at 06:06 and sunset at 18:49. On the last day of September, in Changsha, sunrise is at 06:20 and sunset at 18:15 CST.
Sunshine
In Changsha, the average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Changsha during September?
What is the average humidity in September in Changsha?
How much does it rain in Changsha in September?
When it does not snow in Changsha?
How many hours of daylight does Changsha have in September?
What time are sunrise and sunset in September in Changsha?
How long on average sun shines in September in Changsha?
What is the UV index reading in September in Changsha?
Average temperature in September
Changsha, China
- Average high temperature in September: 29°C
The warmest month (with the highest average high temperature) is August (33.3°C).
The month with the lowest average high temperature is January (9.6°C).
- Average low temperature in September: 20.3°C
The month with the highest average low temperature is July (25°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in September
Changsha, China
- Average pressure in September: 1011.3mbar
The month with the highest atmospheric pressure is January (1026.3mbar).
The month with the lowest atmospheric pressure is July (1003.2mbar).
Average wind speed in September
Changsha, China
- Average wind speed in September: 8.6km/h
The windiest month (with the highest average wind speed) is February (10.3km/h).
The calmest month (with the lowest average wind speed) is June (8.2km/h).
Average humidity in September
Changsha, China
- Average humidity in September: 75%
The month with the highest relative humidity is June (82%).
The months with the lowest relative humidity are October and December (64%).
Average rainfall in September
Changsha, China
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is June (183mm).
The driest month (with the least rainfall) is October (35mm).
Average rainfall days in September
Changsha, China
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is June (20.3 days).
The month with the least rainy days is October (10 days).
Average snowfall in September
Changsha, China
- Average snowfall in September: 0mm
The month with the highest snowfall is January (27mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Changsha, China
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Changsha, China
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 6min).
Average sunshine days in September
Changsha, China
- Average sunshine days in September: 14.5 days
The months with the most sunshine days are October and December (19.5 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in September
Changsha, China
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Changsha, China
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Changsha, China
- Average visibility in September: 9km
The months with the highest visibility are October and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and November (9km).
Changsha, China
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