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September Weather in Bunumbu, Sierra Leone

Last updated: August 31, 2025

In Bunumbu, Sierra Leone, the average temperature in September hovers around 25°C (77°F), with a comfortable minimum of 20°C (68°F) and a warm maximum reaching 32°C (90°F). Expect frequent rain, as the area sees an average precipitation of 429 mm (16.9 in) over 28 days. Coupled with an average humidity of 92%, the weather promises to be both tropical and lush during this month.

September Temperature in Bunumbu

In September in Bunumbu, the average temperature is 25°C (77°F). Maximum temperatures can reach 32°C (90°F) and minimums can dip as low as 20°C (68°F). This makes it an ideal time for travelers seeking warm weather and pleasant conditions.

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

The chart illustrates September temperature patterns in Bunumbu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bunumbu, September typically has an average temperature of 25°C (77°F), with highs reaching up to 32°C (90°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec818483828078767577787879
Data source: Temperature data for Bunumbu generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Bunumbu

In Bunumbu in September, the precipitation amount is 429 mm (16.9 in) over the course of 28 days.

September Precipitation Trends in Bunumbu

The chart displays monthly precipitation patterns in Bunumbu, 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 Bunumbu, September typically receives around 429 mm (16.9 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec523709517326838738742924510620
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bunumbu

In Bunumbu in September humidity is 92%. With an average temperature of 25°C (77°F), this humidity feels like a heavy blanket wrapping around you, making traveling feel rather stifling and exhausting, as the air weighs down on each breath and every step you take.

September Average Humidity in Bunumbu

This chart illustrates the average monthly humidity levels in Bunumbu, 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 Bunumbu is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec52%62%68%78%82%90%89%93%92%90%82%65%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bunumbu

In Bunumbu 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 Bunumbu.

Maximum UV Index Levels in Bunumbu for September

The chart shows the monthly maximum UV Index (UVI) for Bunumbu 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 Bunumbu typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111112131312131313121010
Data source: Bunumbu 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 Bunumbu Compares to Other Months

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

This table compares monthly weather conditions in Bunumbu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)5 mm (0.2 inches)51%extreme
February Weather29°C (84°F)23 mm (0.9 inches)62%extreme
March Weather29°C (84°F)70 mm (2.7 inches)68%extreme
April Weather28°C (82°F)95 mm (3.7 inches)78%extreme
May Weather27°C (80°F)173 mm (6.8 inches)82%extreme
June Weather25°C (78°F)268 mm (10.6 inches)90%extreme
July Weather24°C (76°F)387 mm (15.2 inches)89%extreme
August Weather24°C (76°F)387 mm (15.2 inches)93%extreme
September Weather25°C (77°F)429 mm (16.9 inches)92%extreme
October Weather25°C (78°F)245 mm (9.7 inches)90%extreme
November Weather26°C (79°F)106 mm (4.2 inches)82%very high
December Weather26°C (79°F)20 mm (0.8 inches)65%very high

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