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
As August transitions into September, La Roche Fende records an average high-temperature of a still tropical 31.5°C (88.7°F), showing a gentle shift from the preceding month. An average nighttime temperature of 24.5°C (76.1°F) is noted in La Roche Fende during the month of September.Heat index
In September, the average heat index is estimated at a blistering 41°C (105.8°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
The months with the lowest humidity in La Roche Fende are September and October, with an average relative humidity of 76%.Rainfall
The month with the least rainfall in La Roche Fende, French Guiana, is September, when the rain falls for 12.2 days and typically collects 23mm (0.91") of precipitation.Daylight
The average length of the day in September in La Roche Fende is 12h and 8min.On the first day of September in La Roche Fende, sunrise is at 06:24 and sunset at 18:35. On the last day of the month, sunrise is at 06:17 and sunset at 18:22 -03.
Sunshine
The month with the most sunshine is September, with an average of 9.2h of sunshine.UV index
June through November, with an average maximum UV index of 7, are months with the highest UV index in La Roche Fende. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: In September, a regular UV index of 7 translates into these guidelines:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
How hot is September in La Roche Fende?
What are the least humid months in La Roche Fende?
What is the average humidity in September in La Roche Fende?
What is the driest month in La Roche Fende?
How many days does it rain in September in La Roche Fende?
What is the average length of the day in September in La Roche Fende?
When are sunrise and sunset in September in La Roche Fende?
What month has the most sunshine in La Roche Fende?
How long on average sun shines in September in La Roche Fende?
What is the month with the highest UV index in La Roche Fende?
How high is the UV index in September in La Roche Fende?
Average temperature in September
La Roche Fende, French Guiana
- Average high temperature in September: 31.5°C
The warmest month (with the highest average high temperature) is October (31.6°C).
The month with the lowest average high temperature is February (27.7°C).
- Average low temperature in September: 24.5°C
The months with the highest average low temperature are October and November (24.8°C).
The coldest months (with the lowest average low temperature) are June and July (23.8°C).
Average pressure in September
La Roche Fende, French Guiana
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is July (1013.2mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in September
La Roche Fende, French Guiana
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest month (with the lowest average wind speed) is July (8.3km/h).
Average humidity in September
La Roche Fende, French Guiana
- Average humidity in September: 76%
The month with the highest relative humidity is May (86%).
The months with the lowest relative humidity are September and October (76%).
Average rainfall in September
La Roche Fende, French Guiana
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is May (293mm).
The driest month (with the least rainfall) is September (23mm).
Average rainfall days in September
La Roche Fende, French Guiana
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (28.9 days).
The month with the least rainy days is October (11.6 days).
Average daylight in September /
Average sunshine in September
La Roche Fende, 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 54min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
La Roche Fende, French Guiana
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is June (0.9 days).
Average UV index in September
La Roche Fende, French Guiana
- Average UV index in September: 7
The months with the highest UV index are June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May and December (UV index 6).
Average cloud cover in September
La Roche Fende, French Guiana
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in September
La Roche Fende, French Guiana
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, August, September, October and November (10km).
The months with the lowest visibility are April, May, June, July and December (9km).
La Roche Fende, French Guiana
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