September weather forecastCoaina, Guinea-Bissau
September
Weather in September
The first month of the autumn, September, is a hot month in Coaina, Guinea-Bissau, with an average temperature fluctuating between 23.6°C (74.5°F) and 30.9°C (87.6°F).Temperature
Entering September, Coaina's average high-temperature reads a hot 30.9°C (87.6°F), indicating a close resemblance to the previous month's climate. September nights cool down to an average low-temperature of 23.6°C (74.5°F).Heat index
September's mean heat index is computed to be a blisteringly hot 42°C (107.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The months with the highest humidity in Coaina are August and September, with an average relative humidity of 85%.Rainfall
In Coaina, in September, it is raining for 22.2 days, with typically 168mm (6.61") of accumulated precipitation. Throughout the year, there are 109.7 rainfall days, and 868mm (34.17") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 11min.On the first day of September, sunrise is at 06:46 and sunset at 19:07. On the last day of the month, sunrise is at 06:45 and sunset at 18:47 GMT.
Sunshine
In September, the average sunshine is 6.4h.UV index
January through July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 7 in September translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Coaina, Guinea-Bissau
- Average high temperature in September: 30.9°C
The warmest month (with the highest average high temperature) is March (40.2°C).
The month with the lowest average high temperature is August (29.9°C).
- Average low temperature in September: 23.6°C
The month with the highest average low temperature is June (25.1°C).
The coldest month (with the lowest average low temperature) is February (18.5°C).
Average pressure in September
Coaina, Guinea-Bissau
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is July (1013mbar).
The month with the lowest atmospheric pressure is April (1010mbar).
Average wind speed in September
Coaina, Guinea-Bissau
- Average wind speed in September: 6.4km/h
The windiest month (with the highest average wind speed) is May (9.4km/h).
The calmest month (with the lowest average wind speed) is October (5.7km/h).
Average humidity in September
Coaina, Guinea-Bissau
- Average humidity in September: 85%
The months with the highest relative humidity are August and September (85%).
The month with the lowest relative humidity is January (32%).
Average rainfall in September
Coaina, Guinea-Bissau
- Average rainfall in September: 168mm
The wettest month (with the highest rainfall) is August (286mm).
The driest months (with the least rainfall) are January, February and December (0mm).
Average rainfall days in September
Coaina, Guinea-Bissau
- Average rainfall days in September: 22.2 days
The month with the highest number of rainy days is August (25.7 days).
The months with the least rainy days are January and February (0 days).
Average daylight in September /
Average sunshine in September
Coaina, Guinea-Bissau
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in September: 6h and 24min
The month with the most sunshine is March (Average sunshine: 10h and 0min).
The month with the least sunshine is August (Average sunshine: 5h and 6min).
Average sunshine days in September
Coaina, Guinea-Bissau
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is January (30.9 days).
The month with the least sunshine days is August (4 days).
Average UV index in September
Coaina, Guinea-Bissau
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, September, October, November and December (UV index 7).
The month with the lowest UV index is August (UV index 6).
Average cloud cover in September
Coaina, Guinea-Bissau
- Average cloud cover in September: 55
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is March (Cloud cover 7).
Average visibility in September
Coaina, Guinea-Bissau
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, November and December (10km).
The months with the lowest visibility are August and September (8km).
