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Weather & Climate in Merlo, Argentina
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Merlo enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 74°F in January while summers reach 49°F in July / relatively mild seasonal variation. The area gets 286 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 27.6 inches (drier than the 38-inch national average). The city sits at an elevation of 2,831 feet.
Temperature
74°F Jan (23°C)
49°F Jul (10°C)
| Annual Average | 62.4°F |
| 16% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 49°F (10°C) |
| Sunny Days | 286 days/yr |
Geography
| Elevation | 2,831 ft (863 m) |
| Area | 9.8 sq mi (25.5 km²) |
| Population Density | 1,134/sq mi |
| Coordinates | -32.3429°N, 65.0140°W |
| Timezone | America/Argentina/San_Luis |
Precipitation & Snow
Air Quality
Earthquake History
28 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Sep 9, 2016 | 70 km W of Salsacate, Argentina | M5.6 | 132 km | 158 km |
| Sep 24, 2024 | 57 km W of Salsacate, Argentina | M5.0 | 128 km | 152 km |
| Feb 28, 2023 | La Rioja-Cordoba border region, Argentina | M5.0 | 149 km | 10 km |
| Jul 31, 1993 | 71 km S of Castro Barros, Argentina | M4.9 | 149 km | 170 km |
| Feb 3, 2010 | 69 km NW of Candelaria, Argentina | M4.7 | 150 km | 129 km |
| Sep 12, 2013 | 3 km E of Mina Clavero, Argentina | M4.7 | 70 km | 20 km |
| Dec 28, 2012 | 9 km ENE of Salsacate, Argentina | M4.7 | 116 km | 10 km |
| Nov 24, 1999 | 40 km SW of La Toma, Argentina | M4.5 | 138 km | 33 km |
| Jul 26, 2021 | 33 km SE of Luján, Argentina | M4.5 | 64 km | 10 km |
| Jan 30, 2003 | 69 km W of San Carlos, Argentina | M4.4 | 143 km | 163 km |
| Dec 17, 2012 | 7 km W of Santa Rosa del Conlara, Argentina | M4.4 | 26 km | 20 km |
| Feb 22, 2024 | 9 km SSE of Salsacate, Argentina | M4.3 | 105 km | 10 km |
| Mar 5, 2003 | 2 km WSW of Villa Rumipal, Argentina | M4.1 | 50 km | 33 km |
| Jan 29, 2021 | 18 km NW of Cuesta Blanca, Argentina | M4.1 | 114 km | 10 km |
| Feb 4, 2017 | 75 km NNW of Candelaria, Argentina | M4.1 | 149 km | 136 km |
| Jun 6, 2008 | 20 km N of La Punta, Argentina | M4.1 | 140 km | 45 km |
| Aug 12, 2019 | 17 km NNW of Santa Rosa del Conlara, Argentina | M4.0 | 27 km | 10 km |
| Sep 26, 2013 | 33 km NNE of La Punta, Argentina | M4.0 | 125 km | 93 km |
| Dec 4, 2001 | 69 km NW of Candelaria, Argentina | M4.0 | 148 km | 139 km |
| Nov 8, 2012 | 26 km ESE of Salsacate, Argentina | M4.0 | 110 km | 56 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 4.1 in | Warmest, Wettest |
| February | 72°F (22°C) | 3.3 in | |
| March | 68°F (20°C) | 3.5 in | |
| April | 62°F (16°C) | 2.1 in | |
| May | 56°F (13°C) | 1.3 in | |
| June | 50°F (10°C) | 0.6 in | Driest |
| July | 49°F (10°C) | 0.8 in | Coldest |
| August | 53°F (12°C) | 0.8 in | |
| September | 58°F (15°C) | 1.3 in | |
| October | 64°F (18°C) | 2.7 in | |
| November | 69°F (21°C) | 3.3 in | |
| December | 73°F (23°C) | 3.9 in |
Merlo has a seasonal temperature swing of 25°F / from 49°F in July to 74°F in January. Total annual precipitation is 27.6 inches, with January being the wettest month (4.1") and June the driest (0.6").