Grand Baie Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Grand Baie, Plaines Wilhems, Mauritius. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.
Generally, Grand Baie has a moderate amount of precipitation, averaging 824 mm (32 in) of rainfall annually. However, it does experience a distinct dry season during certain months. Take a look at our detailed charts below to see the seasonal variation.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Grand Baie shows significant variation throughout the year. Expect 169 mm (6.7 in) of precipitation during the wettest month February, distributed over 17 rainy days.
In contrast, October offers drier and sunnier days, with around 24 mm (0.9 in) of rainfall over 13 rainy days.
February, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 224 hours of sunshine in this period. During the driest month October you can expect a temperature of 26°C (79°F). For more detailed insights into the city's temperatures, visit our Grand Baie Temperature page.
Daily Historical Precipitation
49-year average (1977-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Grand Baie's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Grand Baie spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Mauritius: City Comparison
The map below shows the annual precipitation across Mauritius. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Grand Baie vs World: Rainfall Compared
Grand Baie's average annual precipitation is 824 mm (32 in). Let's compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
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.
Climate change is affecting precipitation patterns worldwide, including Grand Baie:
- 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 Grand Baie's weather, including sunshine hours, humidity levels, and temperature data, visit our Grand Baie Climate page.
