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
September
Weather in September
Temperature
The arrival of September records an average high-temperature of a still hot 30.9°C (87.6°F), closely related to the 31.9°C (89.4°F) observed in August. The average nighttime temperature lowers to a moderately hot 23.2°C (73.8°F) throughout September.Heat index
September's heat index is evaluated at an extremely hot 42°C (107.6°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
August and September, with an average relative humidity of 83%, are the most humid months.Rainfall
In Ba Vì, during September, the rain falls for 22.4 days and regularly aggregates up to 204mm (8.03") of precipitation. Throughout the year, there are 236.6 rainfall days, and 1444mm (56.85") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 16min.On the first day of September, sunrise is at 05:41 and sunset at 18:14. On the last day of the month, sunrise is at 05:49 and sunset at 17:47 +07.
Sunshine
The average sunshine in September in Ba Vì is 8.3h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the most humid month?
What is the average humidity in September in Ba Vì?
How many days does it rain in September?
What is the average length of the day in September in Ba Vì?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Ba Vì, Vietnam
- Average high temperature in September: 30.9°C
The warmest month (with the highest average high temperature) is June (34.1°C).
The month with the lowest average high temperature is January (20.1°C).
- Average low temperature in September: 23.2°C
The month with the highest average low temperature is June (25.4°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).
Average pressure in September
Ba Vì, Vietnam
- Average pressure in September: 1009mbar
The month with the highest atmospheric pressure is December (1019.2mbar).
The month with the lowest atmospheric pressure is June (1003.4mbar).
Average wind speed in September
Ba Vì, Vietnam
- Average wind speed in September: 5km/h
The windiest month (with the highest average wind speed) is March (8.6km/h).
The calmest month (with the lowest average wind speed) is September (5km/h).
Average humidity in September
Ba Vì, Vietnam
- Average humidity in September: 83%
The months with the highest relative humidity are August and September (83%).
The month with the lowest relative humidity is February (71%).
Average rainfall in September
Ba Vì, Vietnam
- Average rainfall in September: 204mm
The wettest month (with the highest rainfall) is August (317mm).
The driest month (with the least rainfall) is February (15mm).
Average rainfall days in September
Ba Vì, Vietnam
- Average rainfall days in September: 22.4 days
The month with the highest number of rainy days is July (28.3 days).
The month with the least rainy days is February (12.8 days).
Average daylight in September /
Average sunshine in September
Ba Vì, Vietnam
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Ba Vì, Vietnam
- Average sunshine days in September: 6 days
The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (2.3 days).
Average UV index in September
Ba Vì, Vietnam
- Average UV index in September: 6
The months with the highest UV index are April, May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Ba Vì, Vietnam
- Average cloud cover in September: 47
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is June (Cloud cover 42).
Average visibility in September
Ba Vì, Vietnam
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (9km).
The months with the lowest visibility are July, August and September (8km).
