September Weather in Bo, Sierra Leone

Last updated: August 31, 2025

In Bo, Sierra Leone, the average temperature in September hovers around 25°C (77°F), with a comfortable minimum of 22°C (71°F) and a maximum that can soar to 33°C (92°F). Expect a notable precipitation amount of 505 mm (19.9 in) spread across 28 days, coupled with an average humidity level of 94%. Embrace the tropical vibes as you explore!

September Temperature in Bo

In September in Bo, the average temperature is 25°C (77°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 22°C (71°F). This mild and warm climate makes it an ideal time for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Bo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bo, September typically has an average temperature of 25°C (77°F), with highs reaching up to 33°C (92°F) and lows dropping to around 22°C (71°F).

Data source: Temperature data for Bo generated using information from the Copernicus Climate Change Service.

September Precipitation in Bo

In Bo in September, the precipitation amount is 505 mm (19.9 in) during a span of 28 days.

September Precipitation Trends in Bo

The chart displays monthly precipitation patterns in Bo, 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 Bo, September typically receives around 505 mm (19.9 inches) of precipitation spread over approximately 28 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Bo

In Bo in September, humidity is 94%. With an average temperature of 25°C (77°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities challenging and requiring frequent breaks to stay hydrated.

September Average Humidity in Bo

This chart illustrates the average monthly humidity levels in Bo, 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 Bo is approximately 94%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bo

In Bo 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 Bo.

Maximum UV Index Levels in Bo for September

The chart shows the monthly maximum UV Index (UVI) for Bo 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 Bo typically reaches 13, which falls under the extreme exposure category.

Data source: Bo 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 Bo Compares to Other Months

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

This table compares monthly weather conditions in Bo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (82°F)	9 mm (0.3 inches)	71%	very high
February Weather	29°C (84°F)	32 mm (1.3 inches)	76%	extreme
March Weather	28°C (84°F)	61 mm (2.4 inches)	79%	extreme
April Weather	28°C (82°F)	131 mm (5.1 inches)	83%	extreme
May Weather	27°C (80°F)	231 mm (9.1 inches)	84%	extreme
June Weather	25°C (78°F)	399 mm (15.7 inches)	88%	extreme
July Weather	24°C (76°F)	457 mm (18.0 inches)	89%	extreme
August Weather	24°C (76°F)	546 mm (21.5 inches)	93%	extreme
September Weather	25°C (77°F)	505 mm (19.9 inches)	94%	extreme
October Weather	25°C (78°F)	275 mm (10.8 inches)	91%	extreme
November Weather	26°C (79°F)	123 mm (4.9 inches)	83%	very high
December Weather	26°C (80°F)	31 mm (1.2 inches)	77%	very high