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Weather & Climate in San Antonio, Ecuador
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Antonio experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 51°F in January while summers reach 54°F in July / relatively mild seasonal variation. The area gets 343 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 108.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 3,888 feet.
Temperature
51°F Jan (10°C)
54°F Jul (12°C)
| Annual Average | 53.8°F |
| 0% below US avg | |
| January Average | 51°F (10°C) |
| July Average | 54°F (12°C) |
| Sunny Days | 343 days/yr |
Geography
| Elevation | 3,888 ft (1,185 m) |
| Area | 210.1 sq mi (544.3 km²) |
| Population Density | 0/sq mi |
| Coordinates | -3.9819°N, 79.6650°W |
| Timezone | America/Guayaquil |
Precipitation & Snow
Air Quality
Earthquake History
220 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 | 135 km | 68 km |
| Jul 30, 2021 | 7 km E of Sullana, Peru | M6.2 | 148 km | 34 km |
| Aug 3, 1999 | 56 km ENE of Zaruma, Ecuador | M5.9 | 81 km | 88 km |
| Jun 30, 1997 | 11 km NNW of La Breita, Peru | M5.8 | 141 km | 33 km |
| Mar 29, 1991 | 22 km NE of Máncora, Peru | M5.6 | 138 km | 38 km |
| Jun 5, 2017 | Peru-Ecuador border region | M5.6 | 78 km | 49 km |
| May 8, 2025 | 12 km NNW of Cañaveral, Peru | M5.4 | 116 km | 45 km |
| Aug 21, 2023 | 6 km N of Machala, Ecuador | M5.4 | 93 km | 40 km |
| Aug 3, 2014 | 24 km NE of Máncora, Peru | M5.4 | 139 km | 16 km |
| Feb 16, 1990 | 55 km NNW of Tumbes, Peru | M5.3 | 148 km | 76 km |
| Feb 13, 2021 | 33 km W of Celica, Ecuador | M5.3 | 68 km | 69 km |
| Jun 29, 2001 | 19 km NW of Papayal, Peru | M5.3 | 133 km | 33 km |
| Jan 26, 2014 | 25 km WNW of Cañaveral, Peru | M5.3 | 133 km | 11 km |
| Mar 5, 1997 | 13 km E of Zorritos, Peru | M5.3 | 104 km | 37 km |
| Aug 18, 1992 | 12 km W of Baláo, Ecuador | M5.3 | 124 km | 27 km |
| Feb 18, 2021 | 14 km SSW of Yantzaza, Ecuador | M5.2 | 95 km | 100 km |
| Apr 25, 2023 | 10 km NNW of Baláo, Ecuador | M5.2 | 130 km | 69 km |
| Jan 26, 2008 | 27 km S of Playas, Ecuador | M5.2 | 147 km | 64 km |
| Sep 11, 2010 | Peru-Ecuador border region | M5.2 | 106 km | 62 km |
| Jan 15, 2005 | 10 km N of Zorritos, Peru | M5.1 | 122 km | 34 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 1.0 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1953 | N. PERU | Earthquake | 1.0 m | 6 | 122 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (10°C) | 5.3 in | Coldest |
| February | 71°F (22°C) | 7.6 in | |
| March | 71°F (22°C) | 9.3 in | Wettest |
| April | 71°F (22°C) | 6.6 in | Warmest |
| May | 71°F (22°C) | 2.7 in | |
| June | 70°F (21°C) | 0.8 in | |
| July | 54°F (12°C) | 0.4 in | Driest |
| August | 70°F (21°C) | 0.4 in | |
| September | 71°F (22°C) | 0.9 in | |
| October | 71°F (22°C) | 1.3 in | |
| November | 71°F (22°C) | 1.3 in | |
| December | 71°F (22°C) | 2.9 in |
San Antonio has a seasonal temperature swing of 20°F / from 51°F in January to 71°F in April. Total annual precipitation is 39.5 inches, with March being the wettest month (9.3") and July the driest (0.4").