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September Weather in Koidu, Sierra Leone

Last updated: August 31, 2025

In Koidu, Sierra Leone, the average temperature in September is a pleasant 24°C (76°F). Expect minimum temperatures to dip to 19°C (67°F) and maximum temperatures to soar up to 32°C (90°F). During this period, the area experiences significant precipitation, totaling 477 mm (18.8 in) across approximately 28 days, contributing to an average humidity level of 92%.

September Temperature in Koidu

In September in Koidu, the average temperature is 24°C (76°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as 19°C (67°F). This pleasant climate makes it an ideal destination for exploring and outdoor activities.

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

The chart illustrates September temperature patterns in Koidu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koidu, September typically has an average temperature of 24°C (76°F), with highs reaching up to 32°C (90°F) and lows dropping to around 19°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec808383817977757475777778
Data source: Temperature data for Koidu 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 Koidu

In Koidu in September, the total precipitation amount is 477 mm (18.8 in) over a duration of 28 days.

September Precipitation Trends in Koidu

The chart displays monthly precipitation patterns in Koidu, 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 Koidu, September typically receives around 477 mm (18.8 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec3186610919635146049147733015216
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Koidu

In Koidu in September humidity is 92%. With average temperature 24°C (76°F), this humidity feels like a wall of heat that envelops you, making every step feel heavy and sweat trickle relentlessly down your back, turning what should be a pleasant stroll into a sticky challenge for any traveler.

September Average Humidity in Koidu

This chart illustrates the average monthly humidity levels in Koidu, 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 Koidu 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 Koidu

In Koidu in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Koidu, you can check here.

Maximum UV Index Levels in Koidu for September

The chart shows the monthly maximum UV Index (UVI) for Koidu 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 Koidu typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111112131313131314121010
Data source: Koidu 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 Koidu Compares to Other Months

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

This table compares monthly weather conditions in Koidu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)3 mm (0.1 inches)51%extreme
February Weather28°C (83°F)18 mm (0.7 inches)62%extreme
March Weather28°C (83°F)65 mm (2.6 inches)68%extreme
April Weather27°C (81°F)109 mm (4.3 inches)78%extreme
May Weather26°C (79°F)196 mm (7.7 inches)82%extreme
June Weather25°C (77°F)351 mm (13.8 inches)90%extreme
July Weather24°C (75°F)460 mm (18.1 inches)89%extreme
August Weather23°C (75°F)491 mm (19.3 inches)93%extreme
September Weather24°C (76°F)477 mm (18.8 inches)92%extreme
October Weather25°C (77°F)330 mm (13.0 inches)90%extreme
November Weather25°C (77°F)152 mm (6.0 inches)82%very high
December Weather25°C (78°F)16 mm (0.6 inches)65%very high

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