Porto Novo Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Porto Novo, Santo Antao, Cape Verde. 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.
Porto Novo experiences desert-like conditions in terms of precipitation with almost no rainfall, generally receiving 144 mm (5.7 in) annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Porto Novo can be quite wet during September, receiving approximately 46 mm (1.8 in) of precipitation over 5 rainy days.
In contrast May, experiences much drier conditions, with 1.7 mm (0.1 in) of rainfall, spread across 3 rainy days.
September, the wettest month, has a maximum daytime temperature of 26°C (79°F). The city receives 230 hours of sunshine in this period. During the driest month May you can expect a temperature of 23°C (73°F). For more detailed insights into the city's temperatures, visit our Porto Novo Temperature page.
Explore Porto Novo's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Porto Novo spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Cape Verde: City Comparison
The map below shows the annual precipitation across Cape Verde. You can also select the different months in case you are interested in a specific month.
heavy rainfall
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Porto Novo vs World: Rainfall Compared
Porto Novo's average annual precipitation is 144 mm (5.7 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.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
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.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
- Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
- Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.
- 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 Porto Novo's weather, including sunshine hours, humidity levels, and temperature data, visit our Porto Novo Climate page.
