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Weather & Climate in La Unión, Ecuador
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
La Unión enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 78°F in January while summers reach 66°F in July / relatively mild seasonal variation. The area gets 319 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 98.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 335 feet.
Temperature
78°F Jan (26°C)
66°F Jul (19°C)
| Annual Average | 66.3°F |
| 23% above US avg | |
| January Average | 78°F (26°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 319 days/yr |
Geography
| Elevation | 335 ft (102 m) |
| Area | 214.4 sq mi (555.3 km²) |
| Population Density | 0/sq mi |
| Coordinates | -1.7076°N, 79.3945°W |
| Timezone | America/Guayaquil |
Precipitation & Snow
Air Quality
Earthquake History
254 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.8.
| Mar 18, 2023 | 14 km NNW of Baláo, Ecuador | M6.8 | 130 km | 68 km |
| Mar 28, 1996 | 9 km SSW of Pujilí, Ecuador | M6.0 | 105 km | 33 km |
| Feb 4, 2019 | 24 km SSE of Guayaquil, Ecuador | M5.8 | 92 km | 70 km |
| Jun 12, 1991 | 9 km SSW of Alausí, Ecuador | M5.8 | 86 km | 94 km |
| Jul 14, 2022 | 11 km SW of Samborondón, Ecuador | M5.7 | 57 km | 73 km |
| Mar 26, 1995 | 13 km NNW of Naranjito, Ecuador | M5.6 | 40 km | 91 km |
| Feb 22, 2019 | 14 km ESE of Eloy Alfaro, Ecuador | M5.5 | 70 km | 71 km |
| Aug 25, 1996 | 10 km WSW of San Miguel de Salcedo, Ecuador | M5.5 | 106 km | 51 km |
| Sep 20, 2000 | 26 km WSW of Pedro Carbo, Ecuador | M5.5 | 120 km | 33 km |
| Apr 28, 2015 | 6 km NNW of Milagro, Ecuador | M5.4 | 49 km | 89 km |
| Jul 19, 2009 | 16 km WNW of Pedro Carbo, Ecuador | M5.4 | 108 km | 55 km |
| Sep 13, 2003 | 29 km ENE of San Miguel de Salcedo, Ecuador | M5.3 | 143 km | 33 km |
| Mar 25, 2014 | 17 km ESE of Coronel Marcelino Maridueña, Ecuador | M5.3 | 62 km | 35 km |
| Aug 18, 1992 | 12 km W of Baláo, Ecuador | M5.3 | 145 km | 27 km |
| Mar 28, 2004 | 27 km ENE of Píllaro, Ecuador | M5.3 | 139 km | 13 km |
| Jun 21, 2025 | 8 km NW of Naranjal, Ecuador | M5.2 | 106 km | 50 km |
| Apr 25, 2023 | 10 km NNW of Baláo, Ecuador | M5.2 | 133 km | 69 km |
| Nov 5, 1995 | 6 km NE of Llacao, Ecuador | M5.2 | 139 km | 33 km |
| Feb 28, 2010 | 3 km NNW of Santa Ana, Ecuador | M5.2 | 125 km | 35 km |
| May 8, 2023 | 8 km W of Azogues, Ecuador | M5.2 | 127 km | 90 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Licto (87 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Licto | Pyroclastic cone(s) | 3,336 m (10,945 ft) | Unknown | 87 km |
| Sangay | Stratovolcano | 5,286 m (17,343 ft) | 2020 | 122 km |
| Illiniza | Stratovolcano | 5,248 m (17,218 ft) | Unknown | 139 km |
| Cotopaxi | Stratovolcano | 5,911 m (19,393 ft) | 2016 | 157 km |
| Atacazo | Stratovolcano | 4,463 m (14,642 ft) | -320 | 174 km |
| Guagua Pichincha | Stratovolcano | 4,784 m (15,696 ft) | 2002 | 192 km |
| Antisana | Stratovolcano | 5,753 m (18,875 ft) | 1802 | 195 km |
| Chacana | Caldera | 4,643 m (15,233 ft) | 1773 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 78°F (26°C) | 14.2 in | Warmest |
| February | 77°F (25°C) | 15.6 in | |
| March | 78°F (25°C) | 17.4 in | Wettest |
| April | 78°F (26°C) | 12.7 in | |
| May | 77°F (25°C) | 4.8 in | |
| June | 75°F (24°C) | 1.5 in | |
| July | 66°F (19°C) | 0.4 in | Coldest |
| August | 74°F (23°C) | 0.2 in | Driest |
| September | 75°F (24°C) | 0.5 in | |
| October | 75°F (24°C) | 0.6 in | |
| November | 75°F (24°C) | 0.7 in | |
| December | 77°F (25°C) | 4.2 in |
La Unión has a seasonal temperature swing of 12°F / from 66°F in July to 78°F in January. Total annual precipitation is 72.8 inches, with March being the wettest month (17.4") and August the driest (0.2").