September weather forecast
Boulwando, Burkina Faso

September

Weather in September

As September approaches, there is a noticeable decline in the rainfall, indicating the start of the retracting monsoon. The subsiding rains do not impact the lush green sceneries which can still be enjoyed abundantly. The lowering rainfall accompanies a gradual decrease in temperature which provides a pleasant climate for tourists. Observing a considerable decrease from previous months, September experiences rainfall measuring 45mm (1.77"). The reduction in rain showers marks the onset of the dry spell - a characteristic feature of Boulwando’s tropical climate.

Temperature

The advent of September reveals an average high-temperature of a still tropical 33.5°C (92.3°F), showing minimal difference from the prior month. During September, Boulwando's temperature falls to a steady low-temperature average of 24.2°C (75.6°F).

Heat index

For most parts of September, the heat index is calculated to be a scorching 43°C (109.4°F). Precaution: Heat cramps along with heat exhaustion are possible. Heatstroke is a serious risk with continued exertion.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Boulwando, the average relative humidity in September is 65%.

Rainfall

In Boulwando, in September, during 12.7 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, there are 77.9 rainfall days, and 310mm (12.2") of precipitation is accumulated.

Daylight

In Boulwando, the average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:52 and sunset at 18:13. On the last day of the month, sunrise is at 05:52 and sunset at 17:53 GMT.

Sunshine

In Boulwando, the average sunshine in September is 11h.

UV index

The months with the highest UV index are March through June and September, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 8 during September translates into these guidelines:
Never neglect to protect yourself. Eyes and skin can suffer swift damage. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.

Frequently asked questions

How hot is it in September?
September temperatures in Boulwando vary between a high-temperature of 33.5°C (92.3°F) and a low-temperature of 24.2°C (75.6°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 43°C (109.4°F).
What is the average humidity in September?
In Boulwando, the average relative humidity in September is 65%.
How many days does it rain in September in Boulwando?
In Boulwando, in September, it is raining for 12.7 days, with typically 45mm (1.77") of accumulated precipitation.
How many hours of daylight does Boulwando have in September?
The average day length in September is 12h and 12min.
When are sunrise and sunset in September?
In September, on the first day of the month, sunrise is at 05:52 and sunset at 18:13. On the last day of the month, sunrise is at 05:52 and sunset at 17:53 GMT.
How many hours of sunshine does Boulwando have in September?
The average sunshine duration in September is 11h.
When is the highest UV index?
March through June and September, with an average maximum UV index of 8, are months with the highest UV index in Boulwando.
What is the UV index reading in September?
In Boulwando, the average daily maximum UV index in September is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from unsafe exposure to Sun's UV rays.
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
Boulwando, Burkina Faso
  • Average high temperature in September: 33.5°C

The warmest month (with the highest average high temperature) is April (40.8°C).
The month with the lowest average high temperature is August (31.8°C).

  • Average low temperature in September: 24.2°C

The month with the highest average low temperature is May (29.2°C).
The coldest month (with the lowest average low temperature) is January (17.6°C).

Average pressure in September
Boulwando, Burkina Faso
  • Average pressure in September: 1011.4mbar

The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is April (1007.5mbar).

Average wind speed in September
Boulwando, Burkina Faso
  • Average wind speed in September: 9km/h

The windiest month (with the highest average wind speed) is January (14.3km/h).
The calmest month (with the lowest average wind speed) is September (9km/h).

Average humidity in September
Boulwando, Burkina Faso
  • Average humidity in September: 65%

The month with the highest relative humidity is August (70%).
The months with the lowest relative humidity are January and February (14%).

Average rainfall in September
Boulwando, Burkina Faso
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is August (128mm).
The driest months (with the least rainfall) are January, November and December (0mm).

Average rainfall days in September
Boulwando, Burkina Faso
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is August (20.4 days).
The month with the least rainy days is December (0.1 days).

Average daylight in September /
Average sunshine in September
Boulwando, Burkina Faso
  • 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 24min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is May (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).

Average sunshine days in September
Boulwando, Burkina Faso
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is December (30.9 days).
The month with the least sunshine days is August (9.2 days).

Average UV index in September
Boulwando, Burkina Faso
  • Average UV index in September: 8

The months with the highest UV index are March, April, May, June and September (UV index 8).
The month with the lowest UV index is December (UV index 6).

Average cloud cover in September
Boulwando, Burkina Faso
  • Average cloud cover in September: 23

The month with the most cloud cover is August (Cloud cover 38).
The month with the least cloud cover is December (Cloud cover 4).

Average visibility in September
Boulwando, Burkina Faso
  • Average visibility in September: 10km

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

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