Mbweni Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Mbweni, Zanzibar, Tanzania. This average is based on long-term data collected between 1990 and 2020. Now, let's explore all the details to give you a full picture.
Mbweni has a relatively rainy climate with high precipitation levels, averaging 1055 mm (42 in) of rainfall annually. Despite the high annual total, it does experience a distinct dry season during certain months. Examine our detailed charts below to understand these seasonal patterns.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Mbweni can be quite wet during April, receiving approximately 222 mm (8.7 in) of precipitation over 16 rainy days.
In contrast September, experiences much drier conditions, with 34 mm (1.3 in) of rainfall, spread across 7 rainy days.
April, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 154 hours of sunshine in this period. 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 Mbweni Temperature page.
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Mbweni's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Mbweni spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Tanzania: City Comparison
The map below shows the annual precipitation across Tanzania. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Mbweni vs World: Rainfall Compared
Mbweni's average annual precipitation is 1055 mm (42 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.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- 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.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Mbweni's weather, including sunshine hours, humidity levels, and temperature data, visit our Mbweni Climate page.
