September weather forecast
Sunyani, Ghana

Month of September brings Sunyani into a period of transition. Rainfall peaks for the second time in the year at an astounding 112mm (4.41") turning the city into a fresh panorama. Temperatures drop slightly as the city prepares itself for the upcoming dry months. Skies seem to have their mainframe half replaced by clouds, causing the sunlight to play peek-a-boo through the day. This period is a soothing closing note to the rainy months as Sunyani steps into the anticipation of welcoming the dry season.

Temperature

As August transitions into September, Sunyani records an average high-temperature of a still moderately hot 28.9°C (84°F), consistent with the preceding month. Sunyani records an average low of 21.1°C (70°F) throughout the nights in September.

Heat index

For September, the heat index is estimated at a sweltering 36°C (96.8°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

September is the most humid month in Sunyani, with an average relative humidity of 89%.

Rainfall

In September, the rain falls for 25.3 days. Throughout September, 112mm (4.41") of precipitation is accumulated. Throughout the year, there are 211.3 rainfall days, and 716mm (28.19") of precipitation is accumulated.

Daylight

In September, the average length of the day in Sunyani is 12h and 10min.
On the first day of the month, sunrise is at 06:01 and sunset at 18:16. On the last day of September, in Sunyani, sunrise is at 05:57 and sunset at 18:00 GMT.

Sunshine

In Sunyani, the average sunshine in September is 5.6h.

UV index

In Sunyani, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 6 during September leads to these instructions:
Resist extreme sun exposure. Guarding against solar damage is essential. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.