Arusha City Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Arusha City, Arusha Region, Tanzania. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's break down all the details for a clearer picture.

Generally, Arusha City experiences moderate precipitation patterns, averaging 759 mm (30 in) yearly. However, this average masks significant seasonal variation, including a distinct dry season during certain months that are clearly visible in our monthly breakdown below.

Monthly Precipitation Levels

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

The seasons in Arusha City, bring significant changes in precipitation. The wettest month, April, receives high rainfall, with an average of 128 mm (5 in) of precipitation. This rainfall is distributed across 19 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 4.2 mm (0.2 in) over 4 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

April, the wettest month, has a maximum daytime temperature of 28°C (82°F). During the driest month July you can expect a temperature of 26°C (79°F). For more detailed insights into the city's temperatures, visit our Arusha City Temperature page.

Explore Arusha City's Historical Precipitation: 2002-2026

Browse day-by-day precipitation records for Arusha City spanning 25 years. Select any month and year to see actual rainfall and snowfall recorded on each day.

Historical weather Temperatures Precipitation

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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.

Arusha City vs World: Rainfall Compared

Arusha City's average annual precipitation is 759 mm (30 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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 Arusha 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.

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