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Weather & Climate in San Juan Opico, El Salvador
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Juan Opico has a warm climate with an average annual temperature of 75°F (24°C). Winters average 74°F in January while summers reach 75°F in July / relatively mild seasonal variation. The area gets 214 sunny days per year. Annual precipitation totals 67.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 1,699 feet.
Temperature
74°F Jan (23°C)
75°F Jul (24°C)
| Annual Average | 75.1°F |
| 39% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 214 days/yr |
Geography
| Elevation | 1,699 ft (518 m) |
| Area | 84.5 sq mi (218.9 km²) |
| Population Density | 84/sq mi |
| Coordinates | 13.8761°N, 89.3597°W |
| Timezone | America/El_Salvador |
Precipitation & Snow
Air Quality
Earthquake History
1,695 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.7.
| Jan 13, 2001 | 28 km SSW of Puerto El Triunfo, El Salvador | M7.7 | 119 km | 60 km |
| Jun 13, 2007 | 43 km SSE of Iztapa, Guatemala | M6.7 | 141 km | 23 km |
| Feb 13, 2001 | 5 km S of Cojutepeque, El Salvador | M6.6 | 51 km | 10 km |
| May 30, 2019 | 32 km S of La Libertad, El Salvador | M6.6 | 76 km | 58 km |
| Nov 9, 1997 | 13 km NNE of San Sebastián, El Salvador | M6.5 | 60 km | 176 km |
| May 12, 2017 | 78 km SSW of Acajutla, El Salvador | M6.2 | 131 km | 16 km |
| Jan 5, 2025 | 56 km SSE of La Libertad, El Salvador | M6.2 | 99 km | 46 km |
| Jul 21, 2024 | 6 km E of Jalapa, Guatemala | M6.2 | 105 km | 272 km |
| Mar 25, 2013 | 3 km NW of Fraijanes, Guatemala | M6.2 | 137 km | 189 km |
| Dec 22, 1997 | 28 km SSW of Pasaco, Guatemala | M6.1 | 104 km | 59 km |
| Feb 28, 2001 | 24 km S of Zacatecoluca, El Salvador | M6.1 | 88 km | 65 km |
| Aug 28, 2024 | 56 km SSW of La Libertad, El Salvador | M6.1 | 95 km | 26 km |
| Dec 18, 1997 | 11 km WSW of Sensuntepeque, El Salvador | M6.1 | 67 km | 182 km |
| Jan 27, 2024 | 15 km W of Taxisco, Guatemala | M6.1 | 137 km | 90 km |
| Apr 15, 2008 | 42 km SSE of Iztapa, Guatemala | M6.1 | 138 km | 33 km |
| May 23, 1992 | 22 km SW of Acajutla, El Salvador | M6.0 | 82 km | 75 km |
| Sep 28, 1992 | 50 km S of Iztapa, Guatemala | M6.0 | 149 km | 67 km |
| Aug 23, 2025 | 88 km SW of Acajutla, El Salvador | M6.0 | 147 km | 17 km |
| Sep 12, 1993 | 27 km S of Taxisco, Guatemala | M6.0 | 116 km | 68 km |
| Dec 4, 1997 | 33 km S of Iztapa, Guatemala | M6.0 | 143 km | 81 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2005 | Adrian | Category 1 | 81 mph | 184 km |
| 2001 | Iris | Category 4 | 144 mph | 268 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 2.0 m (7 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1902 | EL SALVADOR-GUATEMALA | Questionable Earthquake | 2.0 m | 185 | 45 km |
| 2001 | EL SALVADOR | Earthquake | 0.3 m | 844 | 119 km |
| 1859 | EL SALVADOR | Earthquake | — | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: San Salvador (17 km).
| Name | Type | Elevation | Last Eruption | Distance |
| San Salvador | Stratovolcano | 1,893 m (6,211 ft) | 1917 | 17 km |
| Coatepeque Caldera | Caldera | 746 m (2,448 ft) | Unknown | 21 km |
| Guazapa | Stratovolcano | 1,438 m (4,718 ft) | Unknown | 26 km |
| Santa Ana | Stratovolcano | 2,381 m (7,812 ft) | 2005 | 29 km |
| Singuil, Cerro | Pyroclastic cone(s) | 926 m (3,038 ft) | Unknown | 35 km |
| Ilopango | Caldera | 450 m (1,476 ft) | 1880 | 40 km |
| San Diego | Volcanic field | 781 m (2,562 ft) | Unknown | 46 km |
| Apaneca Range | Stratovolcano(es) | 2,036 m (6,680 ft) | Unknown | 46 km |
| Chingo | Stratovolcano | 1,775 m (5,823 ft) | Unknown | 48 km |
| San Vicente | Stratovolcano | 2,182 m (7,159 ft) | Unknown | 65 km |
| Apastepeque Field | Volcanic field | 700 m (2,297 ft) | Unknown | 66 km |
| Ixtepeque | Lava dome(s) | 1,292 m (4,239 ft) | Unknown | 70 km |
| Suchitan | Stratovolcano(es) | 2,042 m (6,699 ft) | Unknown | 74 km |
| Santiago, Cerro | Volcanic field | 1,192 m (3,911 ft) | Unknown | 75 km |
| Ipala | Stratovolcano | 1,650 m (5,413 ft) | Unknown | 80 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 0.2 in | |
| February | 75°F (24°C) | 0.2 in | Driest |
| March | 77°F (25°C) | 0.5 in | |
| April | 78°F (26°C) | 2.3 in | Warmest |
| May | 77°F (25°C) | 6.9 in | |
| June | 75°F (24°C) | 12.1 in | |
| July | 75°F (24°C) | 12.1 in | |
| August | 75°F (24°C) | 11.2 in | |
| September | 74°F (24°C) | 12.8 in | Wettest |
| October | 74°F (23°C) | 7.8 in | |
| November | 73°F (23°C) | 1.3 in | |
| December | 73°F (23°C) | 0.3 in | Coldest |
San Juan Opico has a seasonal temperature swing of 6°F / from 73°F in December to 78°F in April. Total annual precipitation is 67.5 inches, with September being the wettest month (12.8") and February the driest (0.2").