Merlo Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Merlo.
Climate overview of Merlo
The climate in Merlo, San Luis Province, Argentina, is marked by large temperature swings across the seasons, ranging from 28°C (82°F) in January to 15°C (59°F) in July.
The city receives around 818 mm (32 in) of rain/snowfall per year. It experiences a distinct dry season from May to September, with warm summers and mild winters. January is the wettest month and July the driest.
Merlo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Merlo - and find the best time to visit.
Monthly Temperature in Merlo
In Merlo, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 28°C (82°F) in January to a moderate 15°C (59°F) in July.
Nighttime temperatures range from 16°C (61°F) in January to 2°C (36°F) in July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Merlo
On average, Merlo receives a reasonable amount of rain/snowfall, with an annual precipitation of 818 mm (32 in). The seasons in Merlo bring significant changes in precipitation. The wettest month, January, receives high rainfall, with an average of 128 mm (5 in) of precipitation. This rainfall is distributed across 12 rainy days.
In contrast, the driest month, July, experiences much less rainfall, totaling 13 mm (0.5 in) over 3 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Merlo Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Merlo
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March, April, August, September and October
- Warmest weather: January, February and December
- Fewer rainy days: May, June, July, August and September
- Wettest months: January, February, March, October, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from May to September, with warm summers and mild winters
Frequently asked questions about the climate in Merlo
What is the best time to visit Merlo?
March, April, August, September and October typically offer the most optimal weather in Merlo. In contrast, January, February, May, June, July, November and December tend to have less optimal conditions. Merlo has a distinct dry season from May to September, with warm summers and mild winters.
What temperatures can I expect in Merlo?
Daytime highs range from 15°C (59°F) in July to 28°C (82°F) in January. Nighttime lows range from 2°C (36°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Merlo get?
Annual rainfall is around 818 mm (32 in). January is the wettest month with 128 mm (5 in), while July is the driest with 13 mm (0.5 in).
Merlo 3-Day Forecast
Merlo 3-Day Forecast
Merlo on the map
Merlo is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Córdoba
18°C (64°F) Salta
17°C (63°F) Buenos Aires16°C (61°F) Villa Carlos Paz16°C (61°F) Mendoza14°C (57°F) Mar del Plata13°C (55°F) San Carlos de Bariloche
4°C (39°F) San Martín de los Andes4°C (39°F) 
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