September weather forecast
Kialé, Congo

September

Weather in September

September, the first month of the spring in Kialé, is still a warm month, with an average temperature varying between 21.4°C (70.5°F) and 29.8°C (85.6°F).

Temperature

The start of September sees the average high-temperature at a warm 29.8°C (85.6°F), showing little difference from August's 30.8°C (87.4°F). In September, Kialé's temperature tends to fall to an average low of 21.4°C (70.5°F) during the night.

Heat index

During September, the heat index is evaluated at a sweltering 35°C (95°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Kialé, Congo, during September, the rain falls for 25.8 days and regularly aggregates up to 116mm (4.57") of precipitation. In Kialé, during the entire year, the rain falls for 269.7 days and collects up to 1470mm (57.87") of precipitation.

Daylight

In Kialé, the average length of the day in September is 12h and 6min.
On the first day of the month, sunrise is at 05:57 and sunset at 18:01. On the last day of September, in Kialé, sunrise is at 05:45 and sunset at 17:53 WAT.

Sunshine

In September, the average sunshine is 8.2h.

UV index

February, March, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 6 in September leads to these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.

Frequently asked questions

Is it hot during September?
In Kialé, in September, the average high-temperature is 29.8°C (85.6°F), and the average low-temperature is 21.4°C (70.5°F). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 35°C (95°F).
What is the average humidity in September?
In Kialé, the average relative humidity in September is 73%.
How many days does it rain in September?
In September, the rain falls for 25.8 days. Throughout September, 116mm (4.57") of precipitation is accumulated.
What is the average length of the day in September?
In September, the average day length is 12h and 6min.
When is the sunrise / sunset in September?
In September, on the first day of the month, sunrise is at 05:57 and sunset at 18:01. On the last day of the month, sunrise is at 05:45 and sunset at 17:53 WAT.
How long on average sun shines in September?
In September, the average sunshine duration is 8.2h.
What is the month with the lowest UV index?
February, March, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index.
How high is the UV index in September?
In Kialé, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
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 - Kialé, Congo
Average temperature in September
Kialé, Congo
  • Average high temperature in September: 29.8°C

The warmest months (with the highest average high temperature) are July and August (30.8°C).
The month with the lowest average high temperature is November (27.9°C).

  • Average low temperature in September: 21.4°C

The months with the highest average low temperature are February and March (21.8°C).
The coldest months (with the lowest average low temperature) are June, November and December (20.8°C).

Average pressure in September - Kialé, Congo
Average pressure in September
Kialé, Congo
  • Average pressure in September: 1012.1mbar

The month with the highest atmospheric pressure is June (1012.9mbar).
The month with the lowest atmospheric pressure is February (1010.1mbar).

Average wind speed in September - Kialé, Congo
Average wind speed in September
Kialé, Congo
  • Average wind speed in September: 7.4km/h

The windiest month (with the highest average wind speed) is August (8.3km/h).
The calmest month (with the lowest average wind speed) is December (5.7km/h).

Average humidity in September - Kialé, Congo
Average humidity in September
Kialé, Congo
  • Average humidity in September: 73%

The month with the highest relative humidity is November (85%).
The month with the lowest relative humidity is July (60%).

Average rainfall in September - Kialé, Congo
Average rainfall in September
Kialé, Congo
  • Average rainfall in September: 116mm

The wettest month (with the highest rainfall) is November (226mm).
The driest month (with the least rainfall) is July (14mm).

Average rainfall days in September - Kialé, Congo
Average rainfall days in September
Kialé, Congo
  • Average rainfall days in September: 25.8 days

The month with the highest number of rainy days is October (28.5 days).
The month with the least rainy days is July (9.3 days).

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

The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 12h and 0min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is October (Average sunshine: 6h and 6min).

Average sunshine days in September - Kialé, Congo
Average sunshine days in September
Kialé, Congo
  • Average sunshine days in September: 2.9 days

The month with the most sunshine days is July (19.4 days).
The month with the least sunshine days is October (1.9 days).

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

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

Average cloud cover in September - Kialé, Congo
Average cloud cover in September
Kialé, Congo
  • Average cloud cover in September: 46

The month with the most cloud cover is October (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in September - Kialé, Congo
Average visibility in September
Kialé, Congo
  • Average visibility in September: 9km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are October, November and December (8km).

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