nomadseason

September Weather in Sunyani, Ghana

Last updated: August 23, 2025

In Sunyani, Ghana, the average temperature in September peaks at a pleasant 26°C (78°F). Expect comfortable lows of around 21°C (70°F) and highs reaching up to 33°C (92°F). However, be prepared for the possibility of rain, as 181 mm (7.1 in) of precipitation can fall over 25 days. Keep in mind, the air is quite humid with an average humidity of 92%, creating a tropical atmosphere!

September Temperature in Sunyani

In September in Sunyani, the average temperature is 26°C (78°F). The maximum can reach 33°C (92°F), and the minimum can be as low as 21°C (70°F). This pleasant climate makes Sunyani an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Sunyani: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sunyani, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sunyani, September typically has an average temperature of 26°C (78°F), with highs reaching up to 33°C (92°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec838584838280787878798081
Data source: Temperature data for Sunyani generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sunyani

In Sunyani in September, the precipitation amount is 181 mm (7.1 in) spread over a period of 25 days.

September Precipitation Trends in Sunyani

The chart displays monthly precipitation patterns in Sunyani, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sunyani, September typically receives around 181 mm (7.1 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec6379996951091031101811447816
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Sunyani

In Sunyani in September, humidity is 92%. With an average temperature of 26°C (78°F), this humidity feels like walking through a warm, damp blanket, making outdoor activities challenging and requiring frequent breaks to hydrate and cool down.

September Average Humidity in Sunyani

This chart illustrates the average monthly humidity levels in Sunyani, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sunyani is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec42%51%66%76%81%85%87%91%92%90%82%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sunyani

In Sunyani in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Sunyani.

Maximum UV Index Levels in Sunyani for September

The chart shows the monthly maximum UV Index (UVI) for Sunyani in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Sunyani typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11111214131212131312109
Data source: Sunyani September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Sunyani Compares to Other Months

Weather in Sunyani varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sunyani, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sunyani, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)5 mm (0.2 inches)42%extreme
February Weather30°C (86°F)37 mm (1.5 inches)51%extreme
March Weather29°C (84°F)99 mm (3.9 inches)66%extreme
April Weather28°C (83°F)96 mm (3.8 inches)76%extreme
May Weather28°C (82°F)95 mm (3.7 inches)81%extreme
June Weather26°C (80°F)109 mm (4.3 inches)85%extreme
July Weather26°C (78°F)103 mm (4.1 inches)87%extreme
August Weather25°C (78°F)109 mm (4.3 inches)90%extreme
September Weather26°C (78°F)181 mm (7.1 inches)92%extreme
October Weather26°C (79°F)144 mm (5.7 inches)90%extreme
November Weather27°C (81°F)78 mm (3.1 inches)82%very high
December Weather27°C (81°F)16 mm (0.6 inches)69%very high

Compare Sunyani's Climate with Cities Worldwide