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September Weather in Bonthe, Sierra Leone

Last updated: August 31, 2025

In September, the average temperature in Bonthe, Sierra Leone hovers around 26°C (78°F), with a minimum of 23°C (74°F) and a maximum reaching 29°C (85°F). However, be prepared for a relatively wet month, as precipitation totals 565 mm (22.2 in) over 29 days. With an average humidity level of 90%, you can expect a tropical atmosphere throughout your stay.

September Temperature in Bonthe

In September in Bonthe, the average temperature is 26°C (78°F), with maximums reaching 29°C (85°F) and minimums dropping to as low as 23°C (74°F). This mild and pleasant weather makes it an ideal time for travelers to explore and enjoy the outdoors in Bonthe.

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

The chart illustrates September temperature patterns in Bonthe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bonthe, September typically has an average temperature of 26°C (78°F), with highs reaching up to 29°C (85°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181828179787878798081
Data source: Temperature data for Bonthe 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 Bonthe

In Bonthe in September, the precipitation amount is 565 mm (22.2 in) spread over a total of 29 days.

September Precipitation Trends in Bonthe

The chart displays monthly precipitation patterns in Bonthe, 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 Bonthe, September typically receives around 565 mm (22.2 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec33326013134766671457256532816772
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bonthe

In Bonthe in September humidity is 90%. With an average temperature of 26°C (78°F), this humidity feels like a suffocating blanket that sticks to your skin, making even the simplest outdoor activities feel exhausting and draining.

September Average Humidity in Bonthe

This chart illustrates the average monthly humidity levels in Bonthe, 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 Bonthe is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%79%79%77%77%81%82%88%90%86%75%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bonthe

In Bonthe 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 Bonthe.

Maximum UV Index Levels in Bonthe for September

The chart shows the monthly maximum UV Index (UVI) for Bonthe 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 Bonthe typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec101111131312121313121010
Data source: Bonthe 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 Bonthe Compares to Other Months

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

This table compares monthly weather conditions in Bonthe, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)32 mm (1.3 inches)71%very high
February Weather27°C (82°F)32 mm (1.3 inches)78%extreme
March Weather27°C (82°F)60 mm (2.4 inches)79%extreme
April Weather28°C (82°F)131 mm (5.1 inches)77%extreme
May Weather27°C (81°F)347 mm (13.6 inches)77%extreme
June Weather26°C (79°F)666 mm (26.2 inches)81%extreme
July Weather25°C (78°F)714 mm (28.1 inches)82%extreme
August Weather25°C (78°F)572 mm (22.5 inches)88%extreme
September Weather26°C (78°F)565 mm (22.2 inches)90%extreme
October Weather26°C (80°F)328 mm (12.9 inches)86%extreme
November Weather27°C (81°F)167 mm (6.6 inches)75%very high
December Weather27°C (81°F)72 mm (2.8 inches)70%very high

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