September weather forecast
Ancumbo, Guinea-Bissau

September

Weather in September

September, the first month of the autumn in Ancumbo, is a hot month, with temperature in the range of an average low of 25°C (77°F) and an average high of 30.5°C (86.9°F).

Temperature

The high-temperature average in September for Ancumbo is a tropical 30.5°C (86.9°F), staying closely aligned with August's conditions. During the month of September, the nighttime temperature in Ancumbo falls to an average of 25°C (77°F).

Heat index

During September, the heat index is evaluated at a blistering 40°C (104°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In September, the average relative humidity in Ancumbo is 81%.

Rainfall

In September, in Ancumbo, the rain falls for 20.7 days. Throughout September, 132mm (5.2") of precipitation is accumulated. In Ancumbo, during the entire year, the rain falls for 107.5 days and collects up to 726mm (28.58") of precipitation.

Daylight

In Ancumbo, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 06:54 and sunset at 19:14. On the last day of September, in Ancumbo, sunrise is at 06:53 and sunset at 18:55 GMT.

Sunshine

The average sunshine in September is 7.5h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Ancumbo. The months with the lowest UV index in Ancumbo are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.

Frequently asked questions

How hot is September in Ancumbo?
The high-temperature, in September, in Ancumbo, records 30.5°C (86.9°F), while the low-temperature is 25°C (77°F). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 40°C (104°F).
What is the average humidity in September in Ancumbo?
The average relative humidity in September in Ancumbo is 81%.
How many days does it rain in September in Ancumbo?
In Ancumbo, Guinea-Bissau, in September, during 20.7 rainfall days, 132mm (5.2") of precipitation is typically accumulated.
How many hours of daylight does Ancumbo have in September?
The average day length in September is 12h and 11min.
When is the sunrise / sunset in September in Ancumbo?
In September, on the first day of the month, sunrise is at 06:54 and sunset at 19:14. On the last day of the month, sunrise is at 06:53 and sunset at 18:55 GMT.
How many hours of sunshine does Ancumbo have in September?
In Ancumbo, Guinea-Bissau, the average sunshine duration in September is 7.5h.
What is the month with the highest UV index in Ancumbo?
The months with the highest UV index in Ancumbo are January through December, with an average maximum UV index of 7.
When is the lowest UV index in Ancumbo?
January through December, with an average maximum UV index of 7, are months with the lowest UV index in Ancumbo, Guinea-Bissau.
What is the UV index intensity in September in Ancumbo?
The average daily maximum UV index in September in Ancumbo is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Ancumbo, Guinea-Bissau
  • Average high temperature in September: 30.5°C

The warmest month (with the highest average high temperature) is March (35.5°C).
The month with the lowest average high temperature is August (29.6°C).

  • Average low temperature in September: 25°C

The month with the highest average low temperature is June (26°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).

Average pressure in September
Ancumbo, Guinea-Bissau
  • Average pressure in September: 1012.2mbar

The month with the highest atmospheric pressure is July (1012.9mbar).
The months with the lowest atmospheric pressure are March and April (1010.1mbar).

Average wind speed in September
Ancumbo, Guinea-Bissau
  • Average wind speed in September: 9.7km/h

The windiest month (with the highest average wind speed) is June (13.2km/h).
The calmest months (with the lowest average wind speed) are October and November (9km/h).

Average humidity in September
Ancumbo, Guinea-Bissau
  • Average humidity in September: 81%

The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (32%).

Average rainfall in September
Ancumbo, Guinea-Bissau
  • Average rainfall in September: 132mm

The wettest month (with the highest rainfall) is August (270mm).
The driest months (with the least rainfall) are January and February (0mm).

Average rainfall days in September
Ancumbo, Guinea-Bissau
  • Average rainfall days in September: 20.7 days

The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is January (0.3 days).

Average daylight in September /
Average sunshine in September
Ancumbo, Guinea-Bissau
  • Average daylight in September: 12h and 1min

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 30min).

  • Average sunshine in September: 7h and 3min

The months with the most sunshine are March, April and May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 6h and 6min).

Average sunshine days in September
Ancumbo, Guinea-Bissau
  • Average sunshine days in September: 8 days

The month with the most sunshine days is January (30.7 days).
The month with the least sunshine days is August (2.9 days).

Average UV index in September
Ancumbo, Guinea-Bissau
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in September
Ancumbo, Guinea-Bissau
  • Average cloud cover in September: 46

The month with the most cloud cover is August (Cloud cover 57).
The months with the least cloud cover are March and April (Cloud cover 7).

Average visibility in September
Ancumbo, Guinea-Bissau
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).

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