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Weather & Climate in San Juan, Ecuador
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Juan has a warm climate with an average annual temperature of 79°F (26°C). Winters average 78°F in January while summers reach 79°F in July / relatively mild seasonal variation. The area gets 320 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 124.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 30 feet.
Temperature
78°F Jan (26°C)
79°F Jul (26°C)
| Annual Average | 79.1°F |
| 46% above US avg | |
| January Average | 78°F (26°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 320 days/yr |
Geography
| Elevation | 30 ft (9 m) |
| Area | 60.9 sq mi (157.6 km²) |
| Population Density | 211/sq mi |
| Coordinates | -1.6667°N, 79.7667°W |
| Timezone | America/Guayaquil |
Precipitation & Snow
Air Quality
Earthquake History
318 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.
| Aug 4, 1998 | 3 km E of Bahía de Caráquez, Ecuador | M7.2 | 138 km | 33 km |
| Mar 18, 2023 | 14 km NNW of Baláo, Ecuador | M6.8 | 125 km | 68 km |
| Aug 5, 1996 | 24 km NNW of Salinas, Ecuador | M6.3 | 142 km | 33 km |
| Mar 31, 2019 | 31 km N of Santa Elena, Ecuador | M6.2 | 120 km | 18 km |
| Jan 24, 2005 | 23 km W of Jipijapa, Ecuador | M6.1 | 118 km | 17 km |
| Jan 21, 2005 | 21 km WSW of Montecristi, Ecuador | M6.0 | 132 km | 10 km |
| Mar 28, 1996 | 9 km SSW of Pujilí, Ecuador | M6.0 | 134 km | 33 km |
| Jun 12, 1991 | 9 km SSW of Alausí, Ecuador | M5.8 | 120 km | 94 km |
| Feb 4, 2019 | 24 km SSE of Guayaquil, Ecuador | M5.8 | 83 km | 70 km |
| Jan 24, 2005 | 37 km W of Jipijapa, Ecuador | M5.8 | 131 km | 10 km |
| Jul 14, 2022 | 11 km SW of Samborondón, Ecuador | M5.7 | 41 km | 73 km |
| Jan 24, 2005 | 26 km ESE of Santa Elena, Ecuador | M5.6 | 123 km | 29 km |
| Mar 26, 1995 | 13 km NNW of Naranjito, Ecuador | M5.6 | 52 km | 91 km |
| Feb 22, 2019 | 14 km ESE of Eloy Alfaro, Ecuador | M5.5 | 64 km | 71 km |
| Sep 20, 2000 | 26 km WSW of Pedro Carbo, Ecuador | M5.5 | 81 km | 33 km |
| Mar 31, 2019 | 34 km NNE of Santa Elena, Ecuador | M5.5 | 112 km | 19 km |
| Feb 17, 2005 | 50 km NNW of Salinas, Ecuador | M5.5 | 143 km | 10 km |
| Aug 25, 1996 | 10 km WSW of San Miguel de Salcedo, Ecuador | M5.5 | 138 km | 51 km |
| Aug 4, 1998 | 3 km ESE of Bahía de Caráquez, Ecuador | M5.4 | 137 km | 33 km |
| Jul 19, 2009 | 16 km WNW of Pedro Carbo, Ecuador | M5.4 | 67 km | 55 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1933 | ECUADOR | Earthquake | — | — | 142 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Licto (129 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Licto | Pyroclastic cone(s) | 3,336 m (10,945 ft) | Unknown | 129 km |
| Illiniza | Stratovolcano | 5,248 m (17,218 ft) | Unknown | 162 km |
| Sangay | Stratovolcano | 5,286 m (17,343 ft) | 2020 | 163 km |
| Cotopaxi | Stratovolcano | 5,911 m (19,393 ft) | 2016 | 184 km |
| Atacazo | Stratovolcano | 4,463 m (14,642 ft) | -320 | 194 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 78°F (26°C) | 10.6 in | |
| February | 79°F (26°C) | 12.1 in | |
| March | 80°F (26°C) | 13.8 in | Warmest, Wettest |
| April | 80°F (26°C) | 9.1 in | |
| May | 78°F (26°C) | 3.0 in | |
| June | 76°F (25°C) | 0.8 in | |
| July | 79°F (26°C) | 0.2 in | |
| August | 75°F (24°C) | 0.1 in | Coldest, Driest |
| September | 76°F (24°C) | 0.3 in | |
| October | 76°F (24°C) | 0.2 in | |
| November | 76°F (25°C) | 0.3 in | |
| December | 78°F (26°C) | 2.9 in |
San Juan has a seasonal temperature swing of 5°F / from 75°F in August to 80°F in March. Total annual precipitation is 53.3 inches, with March being the wettest month (13.8") and August the driest (0.1").