Jolly Harbour Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Jolly Harbour, Antigua, Antigua & Barbuda. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Now, let's explore all the details to give you a full picture.

On average, Jolly Harbour receives a reasonable amount of rainfall, with an annual precipitation of 937 mm (37 in). Despite this overall moderate level, the city experiences distinct dry season during certain months throughout the year, as illustrated in the precipitation charts below.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, October receives substantial rainfall, averaging 141 mm (5.6 in) of precipitation, recorded across 20 rainy days.

In contrast, the driest month, March brings less rainfall, with 31 mm (1.2 in) over 13 rainy days.

October, the wettest month, has a maximum daytime temperature of 29°C (84°F). During the driest month March you can expect a temperature of 27°C (81°F). For more detailed insights into the city's temperatures, visit our Jolly Harbour Temperature page.

Jolly Harbour's average annual precipitation is 937 mm (37 in). Let's compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.

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

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) 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 Jolly Harbour's weather, including sunshine hours, humidity levels, and temperature data, visit our Jolly Harbour Climate page.