September weather forecastDerassi, Benin
September
Weather in September
September, the first month of the autumn in Derassi, is still a hot month, with temperature in the range of an average high of 32.3°C (90.1°F) and an average low of 22.7°C (72.9°F).Temperature
The onset of September brings with it an average high-temperature of a still hot 32.3°C (90.1°F), showing a negligible variation from the month before. Derassi temperatures generally rest at a low of 22.7°C (72.9°F) during the September nights.Heat index
The average heat index in September is appraised at an extremely hot 44°C (111.2°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
In September, the average relative humidity is 76%.Rainfall
In Derassi, in September, it is raining for 17.6 days, with typically 66mm (2.6") of accumulated precipitation. In Derassi, during the entire year, the rain falls for 103.6 days and collects up to 438mm (17.24") of precipitation.Daylight
The average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 06:37 and sunset at 18:56. On the last day of September, sunrise is at 06:35 and sunset at 18:38 WAT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 7 during September leads to these advisories:
Guard oneself from overexposure. Defence against sun injury is vital. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Derassi, Benin
- Average high temperature in September: 32.3°C
The warmest month (with the highest average high temperature) is April (41.8°C).
The month with the lowest average high temperature is August (30.7°C).
- Average low temperature in September: 22.7°C
The month with the highest average low temperature is May (27.2°C).
The coldest month (with the lowest average low temperature) is January (17.1°C).
Average pressure in September
Derassi, Benin
- Average pressure in September: 1011.5mbar
The month with the highest atmospheric pressure is August (1011.9mbar).
The month with the lowest atmospheric pressure is April (1007.5mbar).
Average wind speed in September
Derassi, Benin
- Average wind speed in September: 6.5km/h
The windiest month (with the highest average wind speed) is May (9.7km/h).
The calmest month (with the lowest average wind speed) is September (6.5km/h).
Average humidity in September
Derassi, Benin
- Average humidity in September: 76%
The month with the highest relative humidity is August (80%).
The month with the lowest relative humidity is January (15%).
Average rainfall in September
Derassi, Benin
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is August (149mm).
The driest months (with the least rainfall) are January, November and December (0mm).
Average rainfall days in September
Derassi, Benin
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is August (23.8 days).
The months with the least rainy days are January, November and December (0.1 days).
Average daylight in September /
Average sunshine in September
Derassi, Benin
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 30min).
- Average sunshine in September: 8h and 54min
The months with the most sunshine are January, November and December (Average sunshine: 10h and 0min).
The month with the least sunshine is August (Average sunshine: 7h and 36min).
Average sunshine days in September
Derassi, Benin
- Average sunshine days in September: 9 days
The months with the most sunshine days are January and December (30.9 days).
The month with the least sunshine days is August (5.3 days).
Average UV index in September
Derassi, Benin
- Average UV index in September: 7
The months with the highest UV index are February, March, April and May (UV index 8).
The months with the lowest UV index are August and December (UV index 6).
Average cloud cover in September
Derassi, Benin
- Average cloud cover in September: 32
The month with the most cloud cover is August (Cloud cover 46).
The month with the least cloud cover is December (Cloud cover 3).
Average visibility in September
Derassi, Benin
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).
