Santiago Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Santiago, Dominican Republic. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's break down all the details for a clearer picture.
On average, Santiago receives a reasonable amount of rainfall, with an annual precipitation of 857 mm (34 in).
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Santiago can be quite wet during May, receiving approximately 118 mm (4.6 in) of precipitation over 13 rainy days.
In contrast July, experiences much drier conditions, with 46 mm (1.8 in) of rainfall, spread across 15 rainy days.
May, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 244 hours of sunshine in this period. During the driest month July you can expect a temperature of 33°C (91°F). For more detailed insights into the city's temperatures, visit our Santiago Temperature page.
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Santiago's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Santiago spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in the Dominican Republic: City Comparison
The map below shows the annual precipitation across the Dominican Republic. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Santiago vs World: Rainfall Compared
Santiago's average annual precipitation is 857 mm (34 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 644 mm (25 in), evenly distributed across the year with no extreme wet or dry seasons.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
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.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Santiago's weather, including sunshine hours, humidity levels, and temperature data, visit our Santiago Climate page.
