All Countries
Weather & Climate in San Juan, Argentina
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Juan enjoys a temperate climate with an average annual temperature of 67°F (20°C). Winters average 83°F in January while summers reach 49°F in July / relatively mild seasonal variation. The area gets 361 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 2.1 inches (drier than the 38-inch national average). The city sits at an elevation of 2,119 feet.
Temperature
83°F Jan (28°C)
49°F Jul (9°C)
| Annual Average | 67.4°F |
| 25% above US avg | |
| January Average | 83°F (28°C) |
| July Average | 49°F (9°C) |
| Sunny Days | 361 days/yr |
Geography
| Elevation | 2,119 ft (646 m) |
| Area | 11.6 sq mi (30.0 km²) |
| Population Density | 9,423/sq mi |
| Coordinates | -31.5373°N, 68.5257°W |
| Timezone | America/Argentina/San_Juan |
Precipitation & Snow
Air Quality
Earthquake History
2,853 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Jan 19, 2021 | 26 km SW of Pocito, Argentina | M6.4 | 42 km | 21 km |
| Jun 8, 1993 | 30 km SE of Calingasta, Argentina | M6.3 | 67 km | 113 km |
| Sep 24, 2002 | 29 km SE of Calingasta, Argentina | M6.3 | 64 km | 120 km |
| Feb 27, 2010 | 40 km WSW of Villa Basilio Nievas, Argentina | M6.0 | 60 km | 40 km |
| Jun 7, 1998 | 45 km ENE of Caucete, Argentina | M5.9 | 66 km | 113 km |
| Sep 15, 1991 | 52 km WSW of Calingasta, Argentina | M5.9 | 134 km | 110 km |
| Oct 30, 1993 | 7 km SE of Caucete, Argentina | M5.8 | 33 km | 107 km |
| Sep 4, 1990 | 34 km ENE of Calingasta, Argentina | M5.7 | 60 km | 112 km |
| May 27, 2003 | 10 km NW of Albardón, Argentina | M5.7 | 20 km | 118 km |
| May 18, 2003 | 31 km ESE of Calingasta, Argentina | M5.5 | 56 km | 114 km |
| Jul 30, 1992 | 87 km ENE of Caucete, Argentina | M5.5 | 108 km | 5 km |
| Nov 27, 1998 | 86 km SW of Villa Basilio Nievas, Argentina | M5.5 | 101 km | 127 km |
| Jul 2, 2002 | 63 km SSW of San Agustín de Valle Fértil, Argentina | M5.5 | 85 km | 27 km |
| May 20, 2019 | 57 km WSW of Calingasta, Argentina | M5.5 | 140 km | 108 km |
| Dec 11, 1998 | 36 km NNW of Villa Basilio Nievas, Argentina | M5.4 | 48 km | 118 km |
| Feb 27, 1991 | 2 km NNW of San José de Jáchal, Argentina | M5.4 | 148 km | 35 km |
| Dec 29, 1992 | 92 km E of Caucete, Argentina | M5.4 | 117 km | 131 km |
| Feb 21, 2002 | 87 km E of Caucete, Argentina | M5.4 | 112 km | 121 km |
| Jan 18, 2010 | 11 km NW of Albardón, Argentina | M5.4 | 21 km | 94 km |
| Dec 1, 1991 | 81 km S of Calingasta, Argentina | M5.4 | 110 km | 115 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 83°F (28°C) | 2.2 in | Warmest, Wettest |
| February | 76°F (24°C) | 1.9 in | |
| March | 71°F (22°C) | 1.4 in | |
| April | 63°F (17°C) | 0.6 in | |
| May | 55°F (13°C) | 0.3 in | |
| June | 48°F (9°C) | 0.1 in | Coldest, Driest |
| July | 49°F (9°C) | 0.2 in | |
| August | 52°F (11°C) | 0.2 in | |
| September | 58°F (14°C) | 0.3 in | |
| October | 66°F (19°C) | 0.6 in | |
| November | 72°F (22°C) | 1.1 in | |
| December | 77°F (25°C) | 1.5 in |
San Juan has a seasonal temperature swing of 36°F / from 48°F in June to 83°F in January. Total annual precipitation is 10.2 inches, with January being the wettest month (2.2") and June the driest (0.1").