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
September and October are characterised by peak temperatures, with an average high of 30.9°C (87.6°F).Heat index
September's heat index is calculated to be a blisteringly hot 40°C (104°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
The months with the lowest humidity in Malmanoury are September and October, with an average relative humidity of 77%.Rainfall
The month with the least rainfall in Malmanoury is September, when the rain falls for 14.3 days and typically collects 29mm (1.14") of precipitation.Daylight
In September, the average length of the day in Malmanoury is 12h and 9min.On the first day of the month, sunrise is at 06:24 and sunset at 18:37. On the last day of September, in Malmanoury, sunrise is at 06:19 and sunset at 18:23 -03.
Sunshine
September has the most sunshine of the year, 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 Malmanoury, French Guiana. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 7 in September interprets into the following advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest in Malmanoury?
How hot does it get in Malmanoury in September?
What are the least humid months in Malmanoury?
What is the average humidity in September in Malmanoury?
What is the driest month in Malmanoury?
How much does it rain in Malmanoury in September?
What is the average length of the day in September in Malmanoury?
When is the sunrise / sunset in September in Malmanoury?
What month has the most sunshine in Malmanoury?
How long on average sun shines in September in Malmanoury?
When is the highest UV index in Malmanoury?
What is the UV index intensity in September in Malmanoury?
Average temperature in September
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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
Malmanoury, 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).
