Climate Overview
The climate in Monrovia is hot. The average annual temperature is 27°C and approximately 3759mm of precipitation falls per year. Monrovia receives a notable amount of rainfall throughout the year, including during its driest month. Monrovia sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Monrovia has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is April, when average highs reach 30°C and the mean temperature sits around 28°C. September is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.
Precipitation
Monrovia is a very wet location, receiving approximately 3759mm of precipitation annually, which averages out to around 313mm per month. The wettest month is September, averaging 636mm of rainfall. June and August also tend to see above-average precipitation. The driest month is January, with just 76mm. That's 560mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Monrovia is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 12km/h in winter, 12km/h in spring, 15km/h in summer, 12km/h in autumn.
Seasons
90 days until Summer
It is currently spring in Monrovia, which began on March 20, 2026. Monrovia sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in April at around 30°C, while the coldest stretch bottoms out in September near 24°C. Summer is next, beginning on June 21, 2026 — 90 days from now.
Spring
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 696mm across the season with a monthly average of 232mm. Winds are generally light, averaging 12km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 28°C. Rainfall is heavy, totalling around 1606mm across the season with a monthly average of 535mm. Winds are moderate at around 15km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 1200mm across the season with a monthly average of 400mm. Winds are generally light, averaging 12km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 29°C. Precipitation is moderate at around 256mm for the season, averaging 85mm per month. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Monrovia based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
