Zanzibar City Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Zanzibar City, Zanzibar, Tanzania. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's break down all the details for a clearer picture.

Zanzibar City experiences significant rainfall throughout the year, averaging 1079 mm (42 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))

Zanzibar City can be quite wet during April, receiving approximately 230 mm (9.1 in) of precipitation over 16 rainy days.

In contrast September, experiences much drier conditions, with 35 mm (1.4 in) of rainfall, spread across 7 rainy days.

April, the wettest month, has a maximum daytime temperature of 30°C (86°F). During the driest month September you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our Zanzibar City Temperature page.

Zanzibar City's average annual precipitation is 1079 mm (42 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.

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.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

Climate change is affecting precipitation patterns worldwide, including Zanzibar City:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• 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 Zanzibar City's weather, including sunshine hours, humidity levels, and temperature data, visit our Zanzibar City Climate page.