Merlo Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Merlo, San Luis Province, Argentina. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.
Generally, Merlo receives mid-range precipitation levels, with 818 mm (32 in) annually. The distribution varies significantly throughout the year, with a distinct dry season during certain months, as shown in our charts below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Merlo can be quite wet during January, receiving approximately 128 mm (5 in) of precipitation over 12 rainy days.
In contrast July, experiences much drier conditions, with 13 mm (0.5 in) of rainfall, spread across 3 rainy days.
January, the wettest month, has a maximum daytime temperature of 28°C (82°F). During the driest month July you can expect a temperature of 15°C (59°F). For more detailed insights into the city's temperatures, visit our Merlo Temperature page.
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Merlo's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Merlo spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Argentina: City Comparison
The map below shows the annual precipitation across Argentina. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Merlo vs World: Rainfall Compared
Merlo's average annual precipitation is 818 mm (32 in). Let's compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
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.
- 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 Merlo's weather, including sunshine hours, humidity levels, and temperature data, visit our Merlo Climate page.
