Roseau Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Roseau. The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Roseau has a notably wet climate with abundant precipitation, recording 1053 mm of rainfall per year.

Monthly Precipitation Levels

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

The climate in Roseau shows significant variation throughout the year. Expect 146 mm of precipitation during the wettest month October, distributed over 19 rainy days.

In contrast, March offers drier and sunnier days, with around 38 mm of rainfall over 15 rainy days.

October, the city’s wettest month, has a maximum daytime temperature of 29°C and receives 220 hours of sunshine. During the driest month March you can expect a temperature of 27°C. For more detailed insights into the city’s temperatures, visit our Roseau Temperature page.

Annual Precipitation in Dominica

The map below shows the annual precipitation across Dominica. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Roseau’s average annual precipitation is 1053 mm. Let’s compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm of rainfall annually, with wet winters and dry summers typical of southern Spain.

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

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

How is Precipitation Measured?

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.

Interesting weather facts

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

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