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 weather during September records an average high-temperature of a still tropical 33.7°C (92.7°F), closely mirroring the preceding month. Dardanelles witnesses an average low-temperature of 21.8°C (71.2°F) throughout the month of September.Heat index
In September, the heat index is evaluated at a life-threatening hot 49°C (120.2°F). Note: Heat exhaustion and heat cramps are probable. Heatstroke can follow with prolonged activity.Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
In Dardanelles, the average relative humidity in September is 76%.Rainfall
September is the month with the least rainfall in Dardanelles. Rain falls for 12.5 days and accumulates 21mm (0.83") of precipitation.Daylight
In September, the average length of the day in Dardanelles is 12h and 8min.On the first day of September, 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
With an average of 8.8h of sunshine, September has the most sunshine of the year.UV index
The months with the highest UV index are August through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 7 transforms into the following advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage 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. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Dardanelles in September?
What is the average humidity in September in Dardanelles?
What is the driest month in Dardanelles?
How many days does it rain in September in Dardanelles?
What is the average length of the day in September in Dardanelles?
When are sunrise and sunset in September in Dardanelles?
What month has the most sunshine in Dardanelles?
How long on average sun shines in September in Dardanelles?
What is the month with the highest UV index in Dardanelles?
What is the UV index reading in September in Dardanelles?
Average temperature in September
Dardanelles, French Guiana
- Average high temperature in September: 33.7°C
The warmest month (with the highest average high temperature) is October (34.3°C).
The month with the lowest average high temperature is February (27.9°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is April (22.4°C).
The coldest month (with the lowest average low temperature) is July (21.3°C).
Average pressure in September
Dardanelles, French Guiana
- Average pressure in September: 1012.1mbar
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
Dardanelles, French Guiana
- Average wind speed in September: 6km/h
The windiest month (with the highest average wind speed) is October (6.1km/h).
The calmest month (with the lowest average wind speed) is June (4.2km/h).
Average humidity in September
Dardanelles, French Guiana
- Average humidity in September: 76%
The month with the highest relative humidity is May (91%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Dardanelles, French Guiana
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is May (195mm).
The driest month (with the least rainfall) is September (21mm).
Average rainfall days in September
Dardanelles, French Guiana
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (28.9 days).
The month with the least rainy days is October (12 days).
Average daylight in September /
Average sunshine in September
Dardanelles, French Guiana
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is September (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Dardanelles, French Guiana
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (16.3 days).
The month with the least sunshine days is May (1.8 days).
Average UV index in September
Dardanelles, French Guiana
- Average UV index in September: 7
The months with the highest UV index are August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, November and December (UV index 6).
Average cloud cover in September
Dardanelles, French Guiana
- Average cloud cover in September: 48
The month with the most cloud cover is February (Cloud cover 78).
The month with the least cloud cover is October (Cloud cover 46).
Average visibility in September
Dardanelles, French Guiana
- Average visibility in September: 7km
The months with the highest visibility are September and October (7km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, November and December (6km).
