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's advent denotes a minor fluctuation in the average high-temperature to a still hot 32.5°C (90.5°F) from August's 33.1°C (91.6°F). In September, Matoumbou records an average nighttime temperature of 22.9°C (73.2°F).Heat index
The heat index in September is calculated to be a sweltering 39°C (102.2°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
In September, the average relative humidity is 62%.Rainfall
In Matoumbou, in September, it is raining for 17.1 days, with typically 41mm (1.61") of accumulated precipitation. Throughout the year, there are 243.1 rainfall days, and 1109mm (43.66") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 5min.On the first day of September, sunrise is at 05:59 and sunset at 18:02. On the last day of the month, sunrise is at 05:46 and sunset at 17:55 WAT.
Sunshine
In Matoumbou, the average sunshine in September is 8.7h.UV index
The months with the highest UV index are January, March through May, July through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 7 translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Matoumbou have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Matoumbou have in September?
What are the months with the highest UV index?
How high is the UV index in September?
Average temperature in September
Matoumbou, Congo
- Average high temperature in September: 32.5°C
The warmest month (with the highest average high temperature) is August (33.1°C).
The month with the lowest average high temperature is November (29.5°C).
- Average low temperature in September: 22.9°C
The month with the highest average low temperature is September (22.9°C).
The coldest months (with the lowest average low temperature) are June and July (20.8°C).
Average pressure in September
Matoumbou, Congo
- Average pressure in September: 1011.9mbar
The month with the highest atmospheric pressure is June (1013.1mbar).
The month with the lowest atmospheric pressure is February (1010.3mbar).
Average wind speed in September
Matoumbou, Congo
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is August (8.6km/h).
The calmest months (with the lowest average wind speed) are April and December (4.7km/h).
Average humidity in September
Matoumbou, Congo
- Average humidity in September: 62%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Matoumbou, Congo
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is November (173mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Matoumbou, Congo
- Average rainfall days in September: 17.1 days
The month with the highest number of rainy days is December (29 days).
The month with the least rainy days is July (2.9 days).
Average daylight in September /
Average sunshine in September
Matoumbou, Congo
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The months with the least sunshine are June, October and November (Average sunshine: 7h and 0min).
Average sunshine days in September
Matoumbou, Congo
- Average sunshine days in September: 10.6 days
The month with the most sunshine days is July (27.4 days).
The month with the least sunshine days is December (1.3 days).
Average UV index in September
Matoumbou, Congo
- Average UV index in September: 7
The months with the highest UV index are January, March, April, May, July, August and September (UV index 7).
The months with the lowest UV index are February, June, October, November and December (UV index 6).
Average cloud cover in September
Matoumbou, Congo
- Average cloud cover in September: 36
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 19).
Average visibility in September
Matoumbou, Congo
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, March, April, November and December (8km).
