Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The transition from August to September sees average high-temperatures adjusting to a hot 30.5°C (86.9°F), from a not significantly different 29.6°C (85.3°F). In September, the recorded average low-temperature in Casseque is a warm 25°C (77°F).Heat index
The heat index for September is evaluated at a blisteringly hot 40°C (104°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.Always consider that heat index estimations are for light winds and places in the shade. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
In Casseque, the average relative humidity in September is 81%.Rainfall
In Casseque, during September, the rain falls for 20.7 days and regularly aggregates up to 132mm (5.2") of precipitation. In Casseque, during the entire year, the rain falls for 107.5 days and collects up to 726mm (28.58") of precipitation.Daylight
In September, the average length of the day in Casseque is 12h and 11min.On the first day of the month, sunrise is at 06:51 and sunset at 19:11. On the last day of September, sunrise is at 06:50 and sunset at 18:52 GMT.
Sunshine
The average sunshine in September in Casseque is 7.5h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index in Casseque. The months with the lowest UV index in Casseque are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 7 in September translates into this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Casseque?
What is the average humidity in September in Casseque?
How many days does it rain in September in Casseque?
How many hours of daylight does Casseque have in September?
When is the sunrise / sunset in September in Casseque?
How many hours of sunshine does Casseque have in September?
What are the months with the highest UV index in Casseque?
What are the months with the lowest UV index in Casseque?
What is the UV index reading in September in Casseque?
Average temperature in September
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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
Casseque, 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).
