Bamako Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Bamako, Mali. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.

On average, Bamako receives a reasonable amount of rainfall, with an annual precipitation of 840 mm (33 in). Despite this overall moderate level, the city experiences distinct dry and rainy season during certain months throughout the year, as illustrated in the precipitation charts below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The seasons in Bamako, bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 264 mm (10 in) of precipitation. This rainfall is distributed across 17 rainy days.

August, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 220 hours of sunshine in this period. During the driest month December you can expect a temperature of 34°C (93°F). For more detailed insights into the city's temperatures, visit our Bamako Temperature page.

Bamako's average annual precipitation is 840 mm (33 in). Let's compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages 964 mm (38 in), with snowy winters and rainy summers.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

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.

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

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