September weather forecastQuesse, Guinea-Bissau
September
Weather in September
September, the first month of the autumn in Quesse, is a hot month, with temperature in the range of an average low of 24.7°C (76.5°F) and an average high of 30.9°C (87.6°F).Temperature
The arrival of September marks a slight shift to an average high-temperature of a tropical 30.9°C (87.6°F) from August's 29.8°C (85.6°F). In Quesse, an average low-temperature of 24.7°C (76.5°F) is recorded during September nights.Heat index
The heat index value during September is calculated to be an extremely hot 41°C (105.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In September, the average relative humidity is 80%.Rainfall
In Quesse, in September, it is raining for 20.5 days, with typically 133mm (5.24") of accumulated precipitation. In Quesse, during the entire year, the rain falls for 103.1 days and collects up to 677mm (26.65") of precipitation.Daylight
The average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 06:53 and sunset at 19:14. On the last day of September, in Quesse, Guinea-Bissau, sunrise is at 06:53 and sunset at 18:55 GMT.
Sunshine
In September, the average sunshine is 7.3h.UV index
January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 7 in September translates into this advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Quesse, Guinea-Bissau
- Average high temperature in September: 30.9°C
The warmest month (with the highest average high temperature) is March (37.1°C).
The month with the lowest average high temperature is August (29.8°C).
- Average low temperature in September: 24.7°C
The month with the highest average low temperature is June (25.7°C).
The coldest month (with the lowest average low temperature) is January (21.2°C).
Average pressure in September
Quesse, Guinea-Bissau
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is July (1012.9mbar).
The month with the lowest atmospheric pressure is April (1010.2mbar).
Average wind speed in September
Quesse, Guinea-Bissau
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is June (12.8km/h).
The calmest month (with the lowest average wind speed) is October (8.6km/h).
Average humidity in September
Quesse, Guinea-Bissau
- Average humidity in September: 80%
The month with the highest relative humidity is August (81%).
The month with the lowest relative humidity is January (26%).
Average rainfall in September
Quesse, Guinea-Bissau
- Average rainfall in September: 133mm
The wettest month (with the highest rainfall) is August (254mm).
The driest months (with the least rainfall) are January, February and December (0mm).
Average rainfall days in September
Quesse, Guinea-Bissau
- Average rainfall days in September: 20.5 days
The month with the highest number of rainy days is August (27.1 days).
The month with the least rainy days is January (0.1 days).
Average daylight in September /
Average sunshine in September
Quesse, 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: 7h and 18min
The months with the most sunshine are March and April (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 5h and 42min).
Average sunshine days in September
Quesse, Guinea-Bissau
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is January (30.7 days).
The month with the least sunshine days is August (3.3 days).
Average UV index in September
Quesse, Guinea-Bissau
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, September, October, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 6).
Average cloud cover in September
Quesse, Guinea-Bissau
- Average cloud cover in September: 47
The month with the most cloud cover is August (Cloud cover 58).
The months with the least cloud cover are March and April (Cloud cover 7).
Average visibility in September
Quesse, Guinea-Bissau
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).
