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 brings an average high-temperature of a still tropical 32.7°C (90.9°F), closely following the temperature pattern of August. Biguiston experiences a mean low-temperature of 22.5°C (72.5°F) during September.Heat index
In September, the average heat index is evaluated at a burning hot 47°C (116.6°F). Warning: Heat cramps and heat exhaustion are anticipated. Heatstroke is a risk with ongoing activity.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
The average relative humidity in September is 79%.Rainfall
In Biguiston, French Guiana, during September, the rain falls for 11.5 days and regularly aggregates up to 26mm (1.02") of precipitation. Throughout the year, in Biguiston, there are 253 rainfall days, and 878mm (34.57") of precipitation is accumulated.Daylight
In Biguiston, French Guiana, the average length of the day in September is 12h and 9min.On the first day of September, sunrise is at 06:29 and sunset at 18:42. On the last day of the month, sunrise is at 06:24 and sunset at 18:28 -03.
Sunshine
With an average of 9.1h of sunshine, September has the most sunshine of the year.UV index
July through November, with an average maximum UV index of 7, are months with the highest UV index in Biguiston. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Biguiston in September?
What is the average humidity in September in Biguiston?
How much does it rain in Biguiston in September?
How many hours of daylight does Biguiston have in September?
What time are sunrise and sunset in September in Biguiston?
What month has the most sunshine in Biguiston?
How long on average sun shines in September in Biguiston?
What is the month with the highest UV index in Biguiston?
How high is the UV index in September in Biguiston?
Average temperature in September
Biguiston, French Guiana
- Average high temperature in September: 32.7°C
The warmest month (with the highest average high temperature) is October (33.1°C).
The month with the lowest average high temperature is February (29.1°C).
- Average low temperature in September: 22.5°C
The month with the highest average low temperature is May (23.3°C).
The coldest month (with the lowest average low temperature) is July (22.2°C).
Average pressure in September
Biguiston, French Guiana
- Average pressure in September: 1011.6mbar
The months with the highest atmospheric pressure are June and July (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.5mbar).
Average wind speed in September
Biguiston, French Guiana
- Average wind speed in September: 7.7km/h
The windiest months (with the highest average wind speed) are February and March (9.5km/h).
The calmest month (with the lowest average wind speed) is July (6.4km/h).
Average humidity in September
Biguiston, French Guiana
- Average humidity in September: 79%
The month with the highest relative humidity is June (88%).
The month with the lowest relative humidity is October (77%).
Average rainfall in September
Biguiston, French Guiana
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is May (137mm).
The driest month (with the least rainfall) is October (23mm).
Average rainfall days in September
Biguiston, French Guiana
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (28 days).
The month with the least rainy days is September (11.5 days).
Average daylight in September /
Average sunshine in September
Biguiston, French Guiana
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 48min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Biguiston, French Guiana
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (16 days).
The month with the least sunshine days is May (1.8 days).
Average UV index in September
Biguiston, French Guiana
- Average UV index in September: 7
The months with the highest UV index are July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June and December (UV index 6).
Average cloud cover in September
Biguiston, French Guiana
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in September
Biguiston, French Guiana
- Average visibility in September: 8km
The months with the highest visibility are February, March and April (9km).
The months with the lowest visibility are June, July and August (7km).
