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
Petit Cayenne observes an average high-temperature of a still tropical 31.5°C (88.7°F) in September, barely different from 30.9°C (87.6°F) in August. Petit Cayenne witnesses an average low-temperature of 24.5°C (76.1°F) throughout the month of September.Heat index
The heat index value during September is evaluated at an extremely hot 41°C (105.8°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
September and October, with an average relative humidity of 76%, are the least humid months.Rainfall
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 23mm (0.91") of precipitation.Daylight
In September, the average length of the day in Petit Cayenne is 12h and 8min.On the first day of September in Petit Cayenne, sunrise is at 06:23 and sunset at 18:35. On the last day of the month, sunrise is at 06:17 and sunset at 18:21 -03.
Sunshine
With an average of 9.2h of sunshine, September has the most sunshine of the year.UV index
June through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 7 in September translates into these instructions:
Deter overexposure. Protecting against the sun's effects is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Petit Cayenne in September?
What is the least humid month in Petit Cayenne?
What is the average humidity in September in Petit Cayenne?
What is the driest month in Petit Cayenne?
How many days does it rain in September in Petit Cayenne?
How many hours of daylight does Petit Cayenne have in September?
When are sunrise and sunset in September in Petit Cayenne?
What month has the most sunshine in Petit Cayenne?
How many hours of sunshine does Petit Cayenne have in September?
When is the highest UV index in Petit Cayenne?
What is the UV index intensity in September in Petit Cayenne?
Average temperature in September
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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 12min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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
Petit Cayenne, 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).
