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Merlo Weather in May
May in Merlo brings pleasant temperatures around 18°C (64°F) during the day, dropping to 6°C (43°F) at night, with some rainfall expected.
Rainfall in Merlo in May
Historically, approximately 4 days this month are expected to have rain, averaging 31 mm (1.2 in). Although rain is not especially frequent, individual showers can still be quite heavy.
Temperature in Merlo in May
Daytime highs in Merlo in May reach 18°C (64°F), with nights around 6°C (43°F). May marks the winter season. The difference between afternoon and evening temperatures is usually noticeable. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit Merlo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Merlo Temperature in May
Min Temperature
6°C (43°F)
Max Temperature
18°C (64°F)
Chance of Rain
12%
Precipitation
31 mm (1.2 in)
Rainy days
4 days
Merlo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Merlo - and find the best time to visit.
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Merlo typically drop from around 22°C (72°F) at the start of May to approximately 18°C (64°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 11°C (52°F).
Average temperatures in May
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 May
Historical weather records for Merlo in May
Browse day-by-day weather records for Merlo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Merlo historical weather extremes in May
Based on weather observations in Merlo between 1999 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 20, 2008, with a maximum of 30°C (86°F).
- On May 28, 2008, Merlo saw its coldest May day with temperatures maxing out at 5°C (41°F).
- Nighttime temperatures dropped to -7°C (19°F) on May 18, 2022, marking the coldest May night on record.
Best Places in Argentina in May
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Merlo in May
For Merlo in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers.
What To Do in Merlo in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping5/10 -
Outdoor sports10/10
Merlo 3-Day Forecast
More climate data for Merlo
See the full Merlo climate overview or explore weather in Argentina.
Popular in May
Where to go in May - average daytime high across popular destinations.
Córdoba
21°C (70°F) Buenos Aires20°C (68°F) Villa Carlos Paz19°C (66°F) Salta
18°C (64°F) Mendoza17°C (63°F) Mar del Plata17°C (63°F) San Carlos de Bariloche8°C (46°F) San Martín de los Andes
9°C (48°F) Bucket list
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