September weather forecastPolémie, French Guiana
September weather for Polémie, French Guiana: The first month of the autumn, September, is still a hot month in Polémie, French Guiana, with an average temperature fluctuating between 22.5°C (72.5°F) and 32.7°C (90.9°F). In Polémie, French Guiana, during September, the rain falls for 11.5 days and regularly aggregates up to 26mm (1.02") of precipitation.
September
Weather in September
The first month of the autumn, September, is still a hot month in Polémie, French Guiana, with an average temperature fluctuating between 22.5°C (72.5°F) and 32.7°C (90.9°F).Temperature
The commencement of September notes an average high-temperature of a still hot 32.7°C (90.9°F), exhibiting little difference from the previous month. Polémie, in September, witnesses an average low-temperature of 22.5°C (72.5°F).Heat index
The average heat index in September is calculated to be a blazing hot 47°C (116.6°F). Guard: Heat exhaustion and heat cramps are foreseeable. Prolonged effort may bring about heatstroke.The standards for the heat index are set for locations in shade and under light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
In September, the average relative humidity in Polémie is 79%.Rainfall
In Polémie, French Guiana, during September, the rain falls for 11.5 days and regularly aggregates up to 26mm (1.02") of precipitation. In Polémie, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.Daylight
The average length of the day in September is 12h and 8min.On the first day of September, sunrise is at 06:28 and sunset at 18:41. On the last day of the month, sunrise is at 06:22 and sunset at 18:27 -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. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 7 during September morphs into the following directions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Polémie, 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
Polémie, 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
Polémie, 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
Polémie, 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
Polémie, 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
Polémie, 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
Polémie, French Guiana
- Average daylight in September: 12h and 6min
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 6min
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
Polémie, 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
Polémie, 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
Polémie, 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
Polémie, 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).
