Discovery Bay Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Discovery Bay, Saint Ann Parish, Jamaica. 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.
Discovery Bay has a notably wet climate with abundant precipitation, recording 1224 mm (48 in) of rainfall per year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Discovery Bay shows significant variation throughout the year. Expect 171 mm (6.7 in) of precipitation during the wettest month October, distributed over 16 rainy days.
In contrast, February offers drier and sunnier days, with around 49 mm (1.9 in) of rainfall over 6 rainy days.
October, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 217 hours of sunshine in this period. During the driest month February you can expect a temperature of 28°C (82°F). For more detailed insights into the city's temperatures, visit our Discovery Bay Temperature page.
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Discovery Bay's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Discovery Bay spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Jamaica: City Comparison
The map below shows the annual precipitation across Jamaica. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Discovery Bay vs World: Rainfall Compared
Discovery Bay's average annual precipitation is 1224 mm (48 in). Let's compare this to some popular worldwide tourist destinations:
The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
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.
Climate change is affecting precipitation patterns worldwide, including Discovery Bay:
- 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 Discovery Bay's weather, including sunshine hours, humidity levels, and temperature data, visit our Discovery Bay Climate page.
