September weather forecastKoïlal, Senegal
September
Weather in September
September, the first month of the autumn in Koïlal, is also a hot month, with an average temperature varying between 24.8°C (76.6°F) and 33.9°C (93°F).Temperature
The introduction of September notes a subtle temperature variation to a still tropical 33.9°C (93°F) from August's 33.7°C (92.7°F). Koïlal witnesses an average low-temperature of 24.8°C (76.6°F) throughout the month of September.Heat index
In September, the average heat index is appraised at a life-threatening hot 48°C (118.4°F). Heed: Expect heat cramps and heat exhaustion. Continued action may cause heatstroke.Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. 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. 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 faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
The most humid month is September, with an average relative humidity of 74%.Rainfall
In September, the rain falls for 19.9 days. Throughout September, 82mm (3.23") of precipitation is accumulated. Throughout the year, there are 75.6 rainfall days, and 317mm (12.48") of precipitation is accumulated.Daylight
In September, the average length of the day in Koïlal is 12h and 13min.On the first day of September, sunrise is at 06:52 and sunset at 19:15. On the last day of the month, sunrise is at 06:53 and sunset at 18:54 GMT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The months with the lowest UV index are January, February, July through September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 7 in September suggests the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koïlal, Senegal
- Average high temperature in September: 33.9°C
The warmest month (with the highest average high temperature) is April (41.4°C).
The month with the lowest average high temperature is August (33.7°C).
- Average low temperature in September: 24.8°C
The month with the highest average low temperature is July (25.9°C).
The coldest month (with the lowest average low temperature) is January (18.8°C).
Average pressure in September
Koïlal, Senegal
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is January (1012.7mbar).
The month with the lowest atmospheric pressure is April (1009.9mbar).
Average wind speed in September
Koïlal, Senegal
- Average wind speed in September: 8.6km/h
The windiest month (with the highest average wind speed) is February (13.7km/h).
The calmest months (with the lowest average wind speed) are September and October (8.6km/h).
Average humidity in September
Koïlal, Senegal
- Average humidity in September: 74%
The month with the highest relative humidity is September (74%).
The month with the lowest relative humidity is January (16%).
Average rainfall in September
Koïlal, Senegal
- Average rainfall in September: 82mm
The wettest month (with the highest rainfall) is August (128mm).
The driest months (with the least rainfall) are January, February and December (0mm).
Average rainfall days in September
Koïlal, Senegal
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is August (21 days).
The months with the least rainy days are January, February and December (0.2 days).
Average daylight in September /
Average sunshine in September
Koïlal, Senegal
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is May (Average sunshine: 10h and 0min).
The month with the least sunshine is August (Average sunshine: 7h and 18min).
Average sunshine days in September
Koïlal, Senegal
- Average sunshine days in September: 8.5 days
The months with the most sunshine days are January and December (30.8 days).
The month with the least sunshine days is August (7.3 days).
Average UV index in September
Koïlal, Senegal
- Average UV index in September: 7
The months with the highest UV index are March, April, May, June and October (UV index 8).
The months with the lowest UV index are January, February, July, August, September, November and December (UV index 7).
Average cloud cover in September
Koïlal, Senegal
- Average cloud cover in September: 34
The month with the most cloud cover is August (Cloud cover 45).
The month with the least cloud cover is April (Cloud cover 6).
Average visibility in September
Koïlal, Senegal
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (10km).
The months with the lowest visibility are August and September (9km).
