Monrovia Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Monrovia. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s break down all the details for a clearer picture.

Monrovia has a relatively rainy climate with high precipitation levels, averaging 3577 mm of rainfall annually.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

Significant seasonal changes in precipitation occur throughout the year. During the wet season, September receives substantial rainfall, averaging 553 mm of precipitation, recorded across 25 rainy days.

In contrast, the drier season, January brings less rainfall, with 88 mm over 2 rainy days.

September, the city’s wettest month, has a maximum daytime temperature of 28°C and receives 98 hours of sunshine. During the driest month January you can expect a temperature of 30°C. For more detailed insights into the city’s temperatures, visit our Monrovia Temperature page.

Annual Precipitation in Liberia

The map below shows the annual precipitation across Liberia. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Monrovia’s average annual precipitation is 3577 mm. Let’s compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm, making it one of the drier Mediterranean climates with rainfall mostly in winter.

Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

How is Precipitation Measured?

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Interesting weather facts

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm wide and 20 cm thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters fell during the winter of 1972.

For more detailed information about Monrovia’s weather, including sunshine hours, humidity levels, and temperature data, visit our Monrovia Climate page.