Kumasi Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Kumasi, Ashanti Region, Ghana. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.
Kumasi experiences significant rainfall throughout the year, averaging 1136 mm (45 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry season during certain months. You can clearly see this in our monthly precipitation graphs below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Kumasi can be quite wet during September, receiving approximately 152 mm (6 in) of precipitation over 23 rainy days.
In contrast January, experiences much drier conditions, with 22 mm (0.9 in) of rainfall, spread across 5 rainy days.
September, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 109 hours of sunshine in this period. During the driest month January you can expect a temperature of 34°C (93°F). For more detailed insights into the city's temperatures, visit our Kumasi Temperature page.
Explore Kumasi's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Kumasi spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Ghana: City Comparison
The map below shows the annual precipitation across Ghana. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
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almost none
Kumasi vs World: Rainfall Compared
Kumasi's average annual precipitation is 1136 mm (45 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
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.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Kumasi's weather, including sunshine hours, humidity levels, and temperature data, visit our Kumasi Climate page.
