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
The average high-temperature during September registers at a still warm 27.5°C (81.5°F), maintaining a close resemblance to the previous month. Bomboru experiences a nighttime temperature average of 20.5°C (68.9°F) during September.Heat index
During September, the heat index is estimated at a hot 33°C (91.4°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The average relative humidity in September is 93%.Rainfall
In Bomboru, in September, it is raining for 30 days, with typically 297mm (11.69") of accumulated precipitation. In Bomboru, Sierra Leone, during the entire year, the rain falls for 252.4 days and collects up to 1704mm (67.09") of precipitation.Daylight
In Bomboru, the average length of the day in September is 12h and 10min.On the first day of September, sunrise is at 06:33 and sunset at 18:49. On the last day of the month, sunrise is at 06:29 and sunset at 18:32 GMT.
Sunshine
The average sunshine in September in Bomboru is 4.9h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Bomboru in September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Bomboru have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Bomboru have in September?
How high is the UV index in September?
Average temperature in September
Bomboru, 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).
Average pressure in September
Bomboru, 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).
Average wind speed in September
Bomboru, 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).
Average humidity in September
Bomboru, 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%).
Average rainfall in September
Bomboru, 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).
Average rainfall days in September
Bomboru, 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).
Average daylight in September /
Average sunshine in September
Bomboru, 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).
Average sunshine days in September
Bomboru, 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).
Average UV index in September
Bomboru, 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).
Average cloud cover in September
Bomboru, 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).
Average visibility in September
Bomboru, 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).
