September Weather in Monrovia, Liberia

Last updated: August 23, 2025

In September, the average temperature in Monrovia, Liberia hovers around 25°C (78°F), with comfortable lows of 23°C (74°F) and pleasant highs reaching 29°C (84°F). Be prepared for a bit of moisture, as the area experiences an average precipitation of 634 mm (25.0 in) over the course of 30 days. With an average humidity of 94%, don’t forget to bring your umbrella and a light jacket!

September Temperature in Monrovia

In September in Monrovia, the average temperature is 25°C (78°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 23°C (74°F). This pleasant climate makes Monrovia an ideal destination for travelers looking to enjoy mild and comfortable weather.

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

The chart illustrates September temperature patterns in Monrovia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monrovia, September typically has an average temperature of 25°C (78°F), with highs reaching up to 29°C (84°F) and lows dropping to around 23°C (74°F).

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

September Precipitation in Monrovia

In Monrovia in September, the total precipitation amount is 634 mm (25.0 in) over a period of 30 days.

September Precipitation Trends in Monrovia

The chart displays monthly precipitation patterns in Monrovia, 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 Monrovia, September typically receives around 634 mm (25.0 inches) of precipitation spread over approximately 30 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Monrovia

In Monrovia in September humidity is 94%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, damp embrace, making travel challenging as the air weighs heavily, inviting sweat to bead on your skin and leaving you feeling sticky and lethargic.

September Average Humidity in Monrovia

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

In Monrovia 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 Monrovia.

Maximum UV Index Levels in Monrovia for September

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

Data source: Monrovia 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 Monrovia Compares to Other Months

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

This table compares monthly weather conditions in Monrovia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	81 mm (3.2 inches)	71%	extreme
February Weather	27°C (81°F)	122 mm (4.8 inches)	76%	extreme
March Weather	27°C (81°F)	171 mm (6.7 inches)	79%	extreme
April Weather	27°C (82°F)	205 mm (8.1 inches)	83%	extreme
May Weather	27°C (81°F)	379 mm (14.9 inches)	84%	extreme
June Weather	26°C (79°F)	781 mm (30.7 inches)	88%	extreme
July Weather	25°C (78°F)	487 mm (19.2 inches)	89%	extreme
August Weather	25°C (78°F)	604 mm (23.8 inches)	93%	extreme
September Weather	25°C (78°F)	634 mm (25.0 inches)	94%	extreme
October Weather	26°C (79°F)	374 mm (14.7 inches)	91%	extreme
November Weather	27°C (80°F)	206 mm (8.1 inches)	83%	very high
December Weather	27°C (81°F)	109 mm (4.3 inches)	77%	very high