September weather forecast
Kailahun, Sierra Leone

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Weather in September

Signaling the start of a transition, September sees a significant fall in rainfall, dropping to 297mm (11.69"). Though the tropical temperatures persist, the city experiences a slight decrease in cloud coverage providing clearer skies. The shorter, less sunny days invite a hint of winter, a subtle deviation from the conventional patterns. The decline in humidity coupled with an increase in visibility, hints at an imminent change of season. Coming out of a long wet streak, September stands as a gateway to the cooler months of Kailahun.

Temperature

The advent of September in Kailahun reveals an average high-temperature of a still warm 27.5°C (81.5°F), showing minimal difference from the prior month. Throughout the month of September, Kailahun expects an average low of 20.5°C (68.9°F).

Heat index

The heat index value during September is computed to be a hot 33°C (91.4°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Factoring in the heat index, values are geared towards shaded areas with light breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

In September, the average relative humidity in Kailahun is 93%.

Rainfall

In September, in Kailahun, the rain falls for 30 days. Throughout September, 297mm (11.69") of precipitation is accumulated. In Kailahun, during the entire year, the rain falls for 252.4 days and collects up to 1704mm (67.09") of precipitation.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September in Kailahun, sunrise is at 06:33 and sunset at 18:50. On the last day of the month, sunrise is at 06:30 and sunset at 18:33 GMT.

Sunshine

In Kailahun, the average sunshine in September is 4.9h.

UV index

In Kailahun, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What are the temperatures in Kailahun in September?

The high-temperature in Kailahun during September is 27.5°C (81.5°F) and the low-temperature is 20.5°C (68.9°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in September is computed to be 33°C (91.4°F).

What is the average humidity in September in Kailahun?

In Kailahun, the average relative humidity in September is 93%.

How many days does it rain in September in Kailahun?

In Kailahun, during September, the rain falls for 30 days and regularly aggregates up to 297mm (11.69") of precipitation.

What is the average length of the day in September in Kailahun?

The average day length in September in Kailahun is 12h and 10min.

When is the sunrise / sunset in September in Kailahun?

In September, on the first day of the month, sunrise is at 06:33 and sunset at 18:50. On the last day of the month, sunrise is at 06:30 and sunset at 18:33 GMT.

How long on average sun shines in September in Kailahun?

The average sunshine duration in September is 4.9h.

How high is the UV index in September in Kailahun?

In September, the average daily maximum UV index in Kailahun is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Kailahun, Sierra Leone

Average temperature in September - Kailahun, Sierra Leone
  • Average high temperature in September: 27.5°C

The warmest month (with the highest average high temperature) is March (36.1°C).
The month with the lowest average high temperature is August (26.1°C).

  • Average low temperature in September: 20.5°C

The month with the highest average low temperature is April (22.1°C).
The coldest month (with the lowest average low temperature) is December (17.5°C).

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Average pressure in September
Kailahun, Sierra Leone

Average pressure in September - Kailahun, Sierra Leone
  • Average pressure in September: 1013.4mbar

The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is March (1010.6mbar).

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Average wind speed in September
Kailahun, Sierra Leone

Average wind speed in September - Kailahun, Sierra Leone
  • Average wind speed in September: 4.3km/h

The windiest month (with the highest average wind speed) is April (5.5km/h).
The calmest month (with the lowest average wind speed) is November (3.3km/h).

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Average humidity in September
Kailahun, Sierra Leone

Average humidity in September - Kailahun, Sierra Leone
  • Average humidity in September: 93%

The month with the highest relative humidity is August (94%).
The month with the lowest relative humidity is January (49%).

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Average rainfall in September
Kailahun, Sierra Leone

Average rainfall in September - Kailahun, Sierra Leone
  • Average rainfall in September: 297mm

The wettest month (with the highest rainfall) is August (319mm).
The driest month (with the least rainfall) is December (7mm).

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Average rainfall days in September
Kailahun, Sierra Leone

Average rainfall days in September - Kailahun, Sierra Leone
  • Average rainfall days in September: 30 days

The month with the highest number of rainy days is August (30.8 days).
The months with the least rainy days are January and December (3.3 days).

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Average daylight in September /
Average sunshine in September
Kailahun, Sierra Leone

Average daylight in September / Average sunshine in September - Kailahun, Sierra Leone
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).

  • Average sunshine in September: 4h and 5min

The month with the most sunshine is January (Average sunshine: 9h and 48min).
The month with the least sunshine is August (Average sunshine: 3h and 0min).

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Average sunshine days in September
Kailahun, Sierra Leone

Average sunshine days in September - Kailahun, Sierra Leone
  • Average sunshine days in September: 0 days

The month with the most sunshine days is January (26.1 days).
The month with the least sunshine days is September (0 days).

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Average UV index in September
Kailahun, Sierra Leone

Average UV index in September - Kailahun, Sierra Leone
  • Average UV index in September: 6

The months with the highest UV index are January, February and March (UV index 7).
The months with the lowest UV index are June, July, August and October (UV index 5).

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Average cloud cover in September
Kailahun, Sierra Leone

Average cloud cover in September - Kailahun, Sierra Leone
  • Average cloud cover in September: 78

The month with the most cloud cover is August (Cloud cover 87).
The month with the least cloud cover is January (Cloud cover 13).

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Average visibility in September
Kailahun, Sierra Leone

Average visibility in September - Kailahun, Sierra Leone
  • Average visibility in September: 5km

The months with the highest visibility are January, February, March and December (9km).
The months with the lowest visibility are August and September (5km).

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Kailahun, Sierra Leone

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