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Weather & Climate in Unión, Guatemala
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Unión has a warm climate with an average annual temperature of 76°F (25°C). Winters average 73°F in January while summers reach 77°F in July / relatively mild seasonal variation. The area gets 356 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 31.1 inches. The city sits at an elevation of 2,927 feet.
Temperature
73°F Jan (23°C)
77°F Jul (25°C)
| Annual Average | 76.1°F |
| 41% above US avg | |
| January Average | 73°F (23°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 356 days/yr |
Geography
| Elevation | 2,927 ft (892 m) |
| Area | 2,995.6 sq mi (7,758.7 km²) |
| Population Density | 0/sq mi |
| Coordinates | 15.9218°N, 91.7765°W |
| Timezone | America/Guatemala |
Precipitation & Snow
Air Quality
Earthquake History
549 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.9.
| Mar 14, 1994 | 6 km ENE of Rizo de Oro, Mexico | M6.9 | 70 km | 164 km |
| Jun 14, 2017 | 2 km SSW of San Pablo, Guatemala | M6.9 | 115 km | 93 km |
| Nov 28, 2001 | 2 km ESE of El Carmen, Mexico | M6.4 | 148 km | 85 km |
| Dec 31, 1996 | 4 km SW of El Ramal (Porvenir), Mexico | M6.4 | 128 km | 100 km |
| May 17, 2023 | 8 km SE of Canillá, Guatemala | M6.4 | 138 km | 252 km |
| Mar 12, 2000 | 3 km ESE of Plan de Ayala, Mexico | M6.3 | 127 km | 62 km |
| Mar 17, 2005 | 10 km NE of San Bartolo, Guatemala | M6.1 | 96 km | 197 km |
| Apr 10, 1994 | 3 km E of Pajapita, Guatemala | M6.0 | 136 km | 100 km |
| Jan 19, 2001 | 6 km NNE of Hidalgo, Mexico | M6.0 | 116 km | 93 km |
| Feb 14, 2002 | 13 km SW of Francisco I. Madero, Mexico | M5.8 | 138 km | 76 km |
| Oct 17, 2000 | 4 km ENE of Nuevo Amatenango, Mexico | M5.8 | 55 km | 181 km |
| Feb 1, 2003 | 7 km NNW of Nuevo Vicente Guerrero (El Chichonal), Mexico | M5.8 | 138 km | 211 km |
| Dec 12, 1999 | 0 km SSW of Sololá, Guatemala | M5.8 | 143 km | 158 km |
| May 5, 2025 | 5 km NNE of Nuevo León, Mexico | M5.8 | 107 km | 261 km |
| Jan 17, 2009 | 5 km NNW of Nueva Colombia, Mexico | M5.8 | 106 km | 169 km |
| Jan 9, 2001 | 7 km NE of Nuevo Milenio Valdivia, Mexico | M5.6 | 127 km | 92 km |
| Sep 11, 2001 | 2 km WNW of San Carlos Sija, Guatemala | M5.6 | 105 km | 161 km |
| Feb 23, 2010 | 19 km NNE of Barillas, Guatemala | M5.6 | 55 km | 10 km |
| Oct 14, 2012 | 5 km SE of Tinajas 1ra. Sección, Mexico | M5.5 | 148 km | 69 km |
| Sep 1, 2012 | 11 km N of Plan de Agua Prieta, Mexico | M5.5 | 112 km | 257 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2013 | Barbara | Category 1 | 81 mph | 229 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
7 volcanoes within 200 km. Closest: Tacana (95 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Tacana | Stratovolcano | 4,064 m (13,333 ft) | 1986 | 95 km |
| Almolonga | Stratovolcano | 3,173 m (10,410 ft) | 1818 | 128 km |
| Santa Maria | Stratovolcano | 3,745 m (12,287 ft) | 2020 | 132 km |
| Toliman | Stratovolcano(es) | 3,158 m (10,361 ft) | Unknown | 159 km |
| Acatenango | Stratovolcano(es) | 3,976 m (13,045 ft) | 1972 | 185 km |
| Fuego | Stratovolcano(es) | 3,763 m (12,346 ft) | 2020 | 188 km |
| Agua | Stratovolcano | 3,760 m (12,336 ft) | Unknown | 196 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 73°F (23°C) | 1.3 in | |
| February | 69°F (21°C) | 1.0 in | Driest |
| March | 72°F (22°C) | 1.0 in | |
| April | 75°F (24°C) | 1.9 in | |
| May | 76°F (24°C) | 4.9 in | |
| June | 74°F (24°C) | 14.5 in | Wettest |
| July | 77°F (25°C) | 11.6 in | Warmest |
| August | 73°F (23°C) | 11.7 in | |
| September | 73°F (23°C) | 14.4 in | |
| October | 72°F (22°C) | 9.4 in | |
| November | 70°F (21°C) | 3.2 in | |
| December | 68°F (20°C) | 1.8 in | Coldest |
Unión has a seasonal temperature swing of 8°F / from 68°F in December to 77°F in July. Total annual precipitation is 76.7 inches, with June being the wettest month (14.5") and February the driest (1.0").