September weather forecast
Dongou, Congo

September

Weather in September

September brings about a shift in the climatic conditions of Dongou with the approach of the rainy season. With the highest humidity level of the year at 81% and average rainfall peaking at 107mm (4.21"), September sees a notable uptick in wet weather. Despite the increase in precipitation, the temperatures remain steady, ensuring overall comfort. The rising moisture and cloud cover provide a unique viewing spectacle of misty landscapes. As September proceeds to October, expect an intensifying rainfall pattern.

Temperature

Dongou measures an average high-temperature of a still hot 31.2°C (88.2°F) in September, nearly consistent with the preceding month. Throughout the month of September, the average temperature in Dongou, Congo, dips to an agreeable 21.1°C (70°F) at night.

Heat index

For September, the heat index is estimated at a blisteringly hot 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In September, the average relative humidity in Dongou is 81%.

Rainfall

In Dongou, during September, the rain falls for 25.4 days and regularly aggregates up to 107mm (4.21") of precipitation. Throughout the year, in Dongou, there are 235.6 rainfall days, and 906mm (35.67") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 05:43 and sunset at 17:52. On the last day of September, sunrise is at 05:34 and sunset at 17:40 WAT.

Sunshine

In Dongou, the average sunshine in September is 8.2h.

UV index

August through October, with an average maximum UV index of 6, are months with the lowest UV index in Dongou. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 6 during September translates into the following guidance:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.

Frequently asked questions

How hot is it in Dongou in September?
The high-temperature, in September, in Dongou, is 31.2°C (88.2°F), while the low-temperature averages to 21.1°C (70°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 42°C (107.6°F).
What is the average humidity in September in Dongou?
In September, the average relative humidity is 81%.
How much does it rain in Dongou in September?
In Dongou, in September, during 25.4 rainfall days, 107mm (4.21") of precipitation is typically accumulated.
How many hours of daylight does Dongou have in September?
In Dongou, the average day length in September is 12h and 8min.
What time are sunrise and sunset in September in Dongou?
On the first day of September in Dongou, sunrise is at 05:43 and sunset at 17:52. On the last day of the month, sunrise is at 05:34 and sunset at 17:40 WAT.
How long on average sun shines in September in Dongou?
In Dongou, the average sunshine duration in September is 8.2h.
What is the month with the lowest UV index in Dongou?
The months with the lowest UV index are August through October, with an average maximum UV index of 6.
What is the UV index intensity in September in Dongou?
In Dongou, Congo, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Dongou, Congo
Average temperature in September
Dongou, Congo
  • Average high temperature in September: 31.2°C

The warmest month (with the highest average high temperature) is January (36.2°C).
The month with the lowest average high temperature is October (31°C).

  • Average low temperature in September: 21.1°C

The month with the highest average low temperature is February (22.4°C).
The coldest month (with the lowest average low temperature) is September (21.1°C).

Average pressure in September - Dongou, Congo
Average pressure in September
Dongou, Congo
  • Average pressure in September: 1011.4mbar

The month with the highest atmospheric pressure is July (1011.9mbar).
The month with the lowest atmospheric pressure is February (1008.4mbar).

Average wind speed in September - Dongou, Congo
Average wind speed in September
Dongou, Congo
  • Average wind speed in September: 4km/h

The windiest month (with the highest average wind speed) is March (5.1km/h).
The calmest month (with the lowest average wind speed) is October (3.7km/h).

Average humidity in September - Dongou, Congo
Average humidity in September
Dongou, Congo
  • Average humidity in September: 81%

The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is January (51%).

Average rainfall in September - Dongou, Congo
Average rainfall in September
Dongou, Congo
  • Average rainfall in September: 107mm

The wettest month (with the highest rainfall) is October (136mm).
The driest month (with the least rainfall) is December (18mm).

Average rainfall days in September - Dongou, Congo
Average rainfall days in September
Dongou, Congo
  • Average rainfall days in September: 25.4 days

The month with the highest number of rainy days is October (27.7 days).
The month with the least rainy days is January (7.3 days).

Average daylight in September / Average sunshine in September - Dongou, Congo
Average daylight in September /
Average sunshine in September
Dongou, Congo
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is January (Average sunshine: 10h and 12min).
The month with the least sunshine is October (Average sunshine: 7h and 48min).

Average sunshine days in September - Dongou, Congo
Average sunshine days in September
Dongou, Congo
  • Average sunshine days in September: 3.4 days

The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is October (1.8 days).

Average UV index in September - Dongou, Congo
Average UV index in September
Dongou, Congo
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, June, July, November and December (UV index 7).
The months with the lowest UV index are August, September and October (UV index 6).

Average cloud cover in September - Dongou, Congo
Average cloud cover in September
Dongou, Congo
  • Average cloud cover in September: 49

The month with the most cloud cover is October (Cloud cover 53).
The month with the least cloud cover is January (Cloud cover 18).

Average visibility in September - Dongou, Congo
Average visibility in September
Dongou, Congo
  • Average visibility in September: 7km

The months with the highest visibility are January, February and December (10km).
The months with the lowest visibility are September and October (7km).

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