Colonia Rosario Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Colonia Rosario, Colonia, Uruguay. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.
Colonia Rosario experiences significant rainfall throughout the year, averaging 1128 mm (44 in) of precipitation annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Precipitation levels in Colonia Rosario remain relatively steady throughout the year. February has the most rain, with 119 mm (4.7 in) over 9 days. In May, this drops slightly to 77 mm (3 in), making the city's climate fairly predictable.
February, the wettest month, has a maximum daytime temperature of 29°C (84°F). During the driest month May you can expect a temperature of 19°C (66°F). For more detailed insights into the city's temperatures, visit our Colonia Rosario 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 Colonia Rosario's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Colonia Rosario spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Uruguay: City Comparison
The map below shows the annual precipitation across Uruguay. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
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almost none
Colonia Rosario vs World: Rainfall Compared
Colonia Rosario's average annual precipitation is 1128 mm (44 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.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
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.
Climate change is affecting precipitation patterns worldwide, including Colonia Rosario:
- 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 Colonia Rosario's weather, including sunshine hours, humidity levels, and temperature data, visit our Colonia Rosario Climate page.
