September weather forecastBum, Sierra Leone
September
Weather in September
September, the first month of the autumn in Bum, is also a moderately hot month, with temperature in the range of an average low of 21.8°C (71.2°F) and an average high of 28.6°C (83.5°F).Temperature
Bum registers an average high-temperature of a still warm 28.6°C (83.5°F) with the arrival of September, showing minor deviation from the preceding month. During the month of September, the temperature generally drops to a low average of 21.8°C (71.2°F).Heat index
September's heat index is appraised at a torrid 36°C (96.8°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
August and September, with an average relative humidity of 92%, are the most humid months.Rainfall
In Bum, in September, during 29.7 rainfall days, 265mm (10.43") of precipitation is typically accumulated. In Bum, during the entire year, the rain falls for 256.6 days and collects up to 1628mm (64.09") of precipitation.Daylight
The average length of the day in September is 12h and 10min.On the first day of September, sunrise is at 06:39 and sunset at 18:55. On the last day of the month, sunrise is at 06:35 and sunset at 18:39 GMT.
Sunshine
The average sunshine in September is 4.5h.UV index
The average daily maximum UV index in September in Bum, Sierra Leone, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bum, Sierra Leone
- Average high temperature in September: 28.6°C
The warmest months (with the highest average high temperature) are February and March (36.8°C).
The month with the lowest average high temperature is August (27.5°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is April (23.8°C).
The coldest month (with the lowest average low temperature) is January (20.1°C).
Average pressure in September
Bum, Sierra Leone
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is July (1014.1mbar).
The months with the lowest atmospheric pressure are February and March (1010.5mbar).
Average wind speed in September
Bum, Sierra Leone
- Average wind speed in September: 5km/h
The windiest month (with the highest average wind speed) is April (5.9km/h).
The calmest month (with the lowest average wind speed) is November (3.5km/h).
Average humidity in September
Bum, Sierra Leone
- Average humidity in September: 92%
The months with the highest relative humidity are August and September (92%).
The month with the lowest relative humidity is February (66%).
Average rainfall in September
Bum, Sierra Leone
- Average rainfall in September: 265mm
The wettest month (with the highest rainfall) is August (341mm).
The driest month (with the least rainfall) is January (5mm).
Average rainfall days in September
Bum, Sierra Leone
- Average rainfall days in September: 29.7 days
The month with the highest number of rainy days is August (30.5 days).
The month with the least rainy days is January (4.3 days).
Average daylight in September /
Average sunshine in September
Bum, Sierra Leone
- Average daylight in September: 12h and 12min
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 30min
The month with the most sunshine is January (Average sunshine: 9h and 36min).
The month with the least sunshine is August (Average sunshine: 3h and 6min).
Average sunshine days in September
Bum, Sierra Leone
- Average sunshine days in September: 0.2 days
The month with the most sunshine days is January (25.3 days).
The month with the least sunshine days is September (0.2 days).
Average UV index in September
Bum, Sierra Leone
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 5).
Average cloud cover in September
Bum, Sierra Leone
- Average cloud cover in September: 79
The month with the most cloud cover is August (Cloud cover 85).
The month with the least cloud cover is January (Cloud cover 23).
Average visibility in September
Bum, Sierra Leone
- Average visibility in September: 6km
The months with the highest visibility are February, March and April (9km).
The months with the lowest visibility are June, July, August, September, October and November (6km).
