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Weather & Climate in La Unión, Honduras
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
La Unión enjoys a temperate climate with an average annual temperature of 70°F (21°C). Winters average 66°F in January while summers reach 71°F in July / relatively mild seasonal variation. The area gets 230 sunny days per year, above the national average. Annual precipitation totals 58.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 3,320 feet.
Temperature
66°F Jan (19°C)
71°F Jul (22°C)
| Annual Average | 69.8°F |
| 29% above US avg | |
| January Average | 66°F (19°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 230 days/yr |
Geography
| Elevation | 3,320 ft (1,012 m) |
| Area | 151.5 sq mi (392.4 km²) |
| Population Density | 20/sq mi |
| Coordinates | 14.8139°N, 88.4085°W |
| Timezone | America/Tegucigalpa |
Precipitation & Snow
Air Quality
Earthquake History
195 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.7.
| Jul 11, 1999 | 16 km N of Potrerillos, Honduras | M6.7 | 108 km | 10 km |
| Feb 13, 2001 | 5 km S of Cojutepeque, El Salvador | M6.6 | 139 km | 10 km |
| Nov 9, 1997 | 13 km NNE of San Sebastián, El Salvador | M6.5 | 116 km | 176 km |
| Dec 18, 1997 | 11 km WSW of Sensuntepeque, El Salvador | M6.1 | 114 km | 182 km |
| May 8, 2001 | 3 km S of San Vicente, El Salvador | M5.7 | 141 km | 10 km |
| May 18, 2005 | 1 km SSE of San José La Arada, Guatemala | M5.3 | 127 km | 42 km |
| Apr 23, 2012 | 28 km NNE of El Estor, Guatemala | M5.2 | 136 km | 10 km |
| Aug 25, 2021 | 11 km NNE of Pinalejo, Honduras | M5.2 | 74 km | 8 km |
| Sep 25, 2022 | 24 km NE of Puerto Barrios, Guatemala | M5.1 | 115 km | 10 km |
| Mar 29, 1999 | 23 km NW of Yamaranguila, Honduras | M5.1 | 42 km | 33 km |
| Jan 11, 2010 | 9 km ESE of Morales, Guatemala | M5.1 | 79 km | 10 km |
| May 8, 2001 | 15 km W of Sesori, El Salvador | M5.0 | 123 km | 10 km |
| Jan 31, 2019 | 0 km S of Chinameca, El Salvador | M5.0 | 147 km | 192 km |
| Apr 7, 2024 | 2 km S of Tenancingo, El Salvador | M5.0 | 127 km | 193 km |
| Feb 19, 2016 | 8 km N of San Sebastián, El Salvador | M5.0 | 121 km | 201 km |
| Mar 19, 2025 | 2 km NE of Ilopango, El Salvador | M4.9 | 142 km | 150 km |
| Jan 10, 2002 | 2 km SE of Tenancingo, El Salvador | M4.9 | 126 km | 197 km |
| May 26, 2008 | 3 km NNW of San Juan Opico, El Salvador | M4.9 | 145 km | 23 km |
| Jul 11, 1999 | 11 km N of Puerto Barrios, Guatemala | M4.8 | 115 km | 10 km |
| Jan 30, 2010 | 5 km NNE of Lolotique, El Salvador | M4.8 | 136 km | 198 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2022 | Lisa | Category 1 | 92 mph | 287 km |
| 2020 | Nana | Category 1 | 75 mph | 221 km |
| 2016 | Earl | Category 1 | 86 mph | 288 km |
| 2010 | Richard | Category 2 | 98 mph | 265 km |
| 2001 | Iris | Category 4 | 144 mph | 157 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 5.0 m (16 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1856 | BAY OF HONDURAS | Eruption + Earthquake | 5.0 m | — | 139 km |
| 1976 | GUATEMALA | Earthquake | 0.1 m | 23,000 | 94 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Yojoa, Lake (50 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Yojoa, Lake | Volcanic field | 1,090 m (3,576 ft) | Unknown | 50 km |
| Chiquimula Volcanic Field | Pyroclastic cone(s) | 1,192 m (3,911 ft) | Unknown | 123 km |
| Guazapa | Stratovolcano | 1,438 m (4,718 ft) | Unknown | 127 km |
| Apastepeque Field | Volcanic field | 700 m (2,297 ft) | Unknown | 128 km |
| San Diego | Volcanic field | 781 m (2,562 ft) | Unknown | 130 km |
| Ipala | Stratovolcano | 1,650 m (5,413 ft) | Unknown | 135 km |
| San Vicente | Stratovolcano | 2,182 m (7,159 ft) | Unknown | 143 km |
| Ixtepeque | Lava dome(s) | 1,292 m (4,239 ft) | Unknown | 144 km |
| Ilopango | Caldera | 450 m (1,476 ft) | 1880 | 145 km |
| Tecapa | Stratovolcano | 1,593 m (5,226 ft) | Unknown | 147 km |
| Chinameca | Stratovolcano | 1,300 m (4,265 ft) | Unknown | 149 km |
| Tigre, El | Stratovolcano | 1,640 m (5,381 ft) | Unknown | 149 km |
| San Salvador | Stratovolcano | 1,893 m (6,211 ft) | 1917 | 153 km |
| Taburete | Stratovolcano | 1,172 m (3,845 ft) | Unknown | 154 km |
| Suchitan | Stratovolcano(es) | 2,042 m (6,699 ft) | Unknown | 155 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 66°F (19°C) | 1.6 in | |
| February | 67°F (20°C) | 1.2 in | |
| March | 71°F (22°C) | 0.8 in | Driest |
| April | 73°F (23°C) | 1.7 in | |
| May | 74°F (23°C) | 6.1 in | Warmest |
| June | 72°F (22°C) | 10.1 in | |
| July | 71°F (22°C) | 6.9 in | |
| August | 71°F (22°C) | 7.8 in | |
| September | 71°F (21°C) | 10.5 in | Wettest |
| October | 69°F (21°C) | 6.1 in | |
| November | 67°F (20°C) | 3.3 in | |
| December | 65°F (19°C) | 2.2 in | Coldest |
La Unión has a seasonal temperature swing of 8°F / from 65°F in December to 74°F in May. Total annual precipitation is 58.3 inches, with September being the wettest month (10.5") and March the driest (0.8").