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
Roche Kawann witnesses its highest temperatures in September and October, reaching an average of 30.9°C (87.6°F).Heat index
September's mean heat index is estimated at a blistering 40°C (104°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Heat index determinations are made taking into account the shade and light air movements. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
The months with the lowest humidity in Roche Kawann are September and October, with an average relative humidity of 77%.Rainfall
September is the month with the least rainfall. Rain falls for 14.3 days and accumulates 29mm (1.14") of precipitation.Daylight
The average length of the day in September in Roche Kawann is 12h and 9min.On the first day of September, sunrise is at 06:27 and sunset at 18:39. On the last day of the month, sunrise is at 06:21 and sunset at 18:25 -03.
Sunshine
The month with the most sunshine in Roche Kawann, French Guiana, is September, with an average of 9.3h of sunshine.UV index
July through November, with an average maximum UV index of 7, are months with the highest UV index in Roche Kawann. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 7 during September translates into the following directions:
Deflect overexposure. Sun protection is a necessity. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year in Roche Kawann?
How hot does it get in Roche Kawann in September?
What is the least humid month in Roche Kawann?
What is the average humidity in September in Roche Kawann?
What is the driest month in Roche Kawann?
How many days does it rain in September in Roche Kawann?
What is the average length of the day in September in Roche Kawann?
When are sunrise and sunset in September in Roche Kawann?
What month has the most sunshine in Roche Kawann?
How many hours of sunshine does Roche Kawann have in September?
What is the month with the highest UV index in Roche Kawann?
What is the UV index reading in September in Roche Kawann?
Average temperature in September
Roche Kawann, French Guiana
- Average high temperature in September: 30.9°C
The warmest months (with the highest average high temperature) are September and October (30.9°C).
The month with the lowest average high temperature is February (27.5°C).
- Average low temperature in September: 24.8°C
The month with the highest average low temperature is November (25.1°C).
The coldest month (with the lowest average low temperature) is January (24.2°C).
Average pressure in September
Roche Kawann, French Guiana
- Average pressure in September: 1012mbar
The months with the highest atmospheric pressure are June and July (1013.1mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
Roche Kawann, French Guiana
- Average wind speed in September: 12.7km/h
The windiest month (with the highest average wind speed) is February (15.3km/h).
The calmest month (with the lowest average wind speed) is July (9.7km/h).
Average humidity in September
Roche Kawann, French Guiana
- Average humidity in September: 77%
The months with the highest relative humidity are February and May (84%).
The months with the lowest relative humidity are September and October (77%).
Average rainfall in September
Roche Kawann, French Guiana
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is May (279mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in September
Roche Kawann, French Guiana
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (29.6 days).
The months with the least rainy days are September and October (14.3 days).
Average daylight in September /
Average sunshine in September
Roche Kawann, 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 2min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Roche Kawann, French Guiana
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is October (13.2 days).
The month with the least sunshine days is May (0.6 days).
Average UV index in September
Roche Kawann, 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
Roche Kawann, French Guiana
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in September
Roche Kawann, French Guiana
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
