Weather in Monrovia

Monrovia is in Liberia at 6.3°N. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. Rain is the monsoon runs from May to October, inside an annual total of 1718 mm. The wettest month is August at 399 mm; the driest is January at 11 mm.

April is the warmest month (average 28.2°C, high 31.1°C) and August is the coolest (average 25.4°C, low 23.2°C). From the coolest night in August (23.2°C) to the hottest afternoon in April (31.4°C), the raw range is 8.2°C. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are December, January, and February.

Temperature through the year

Monrovia has a 2.8°C gap between its coolest monthly average (25.4°C in August) and its warmest (28.2°C in April). That is a northern-hemisphere pattern.

Mean high across all twelve months is 29.7°C and mean low is 24.2°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Rainfall pattern

The monsoon in Monrovia starts in May and ends in October (May, June, July, August, September, and October). August is the core of it at 399 mm. January is the other extreme, with 11 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. August averages 26 such days; January averages 3.

Distinctive months in Monrovia

January is the driest month, averaging only 11 mm across 3 rainy days. Highs sit near 31.3°C. Peak heat arrives in April: 31.1°C by day, 25.3°C at night, and 80% humidity. May is when the monsoon typically starts in Monrovia: highs near 30.4°C, and rainfall jumps to 109 mm (18 rainy days). June brings 226 mm and 21 rainy days; temperatures run from 24.4°C to 29.1°C.

The year bottoms out in August. Plan for 23.2°C at night and 27.5°C in the afternoon. In September, Monrovia averages 27.9°C by day and 23.6°C at night, with 265 mm of rain. October closes the monsoon: 210 mm over 22 rainy days, then the calendar dries. November: 29.4°C high, 24.4°C low, 79 mm rain, 85% humidity.

Best months to visit Monrovia

The three months with the highest comfort score are December, January, and February: December (27.1°C average, 37 mm, 79% humidity); January (27.3°C average, 11 mm, 74% humidity); February (27.9°C average, 23 mm, 78% humidity). Those months sit across the year end, so they are listed in season order rather than January-to-December. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at May–October instead of the score.

How Monrovia compares inside Liberia

Monrovia is the only Liberia city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.