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Weather & Climate in San Antonio del Sur, Cuba
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Antonio del Sur has a warm climate with an average annual temperature of 77°F (25°C). Winters average 77°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 357 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 47.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 39 feet.
Temperature
77°F Jan (25°C)
80°F Jul (27°C)
| Annual Average | 76.8°F |
| 42% above US avg | |
| January Average | 77°F (25°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 357 days/yr |
Geography
| Elevation | 39 ft (12 m) |
| Area | 217.5 sq mi (563.3 km²) |
| Population Density | 0/sq mi |
| Coordinates | 20.0576°N, 74.8105°W |
| Timezone | America/Havana |
Precipitation & Snow
Air Quality
Earthquake History
79 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Dec 28, 1998 | 31 km ENE of Moa, Cuba | M5.6 | 82 km | 10 km |
| Mar 20, 2010 | 53 km SSW of Guantánamo, Cuba | M5.6 | 69 km | 15 km |
| Feb 16, 2023 | 37 km WSW of Bombardopolis, Haiti | M5.4 | 129 km | 10 km |
| May 22, 1990 | Cuba region | M5.4 | 132 km | 14 km |
| Feb 12, 2010 | 49 km SSW of Maisí, Cuba | M5.3 | 51 km | 10 km |
| Jan 17, 2016 | 39 km SSW of El Cobre, Cuba | M5.2 | 140 km | 10 km |
| Sep 4, 1990 | 28 km SSE of Santiago de Cuba, Cuba | M5.2 | 96 km | 33 km |
| Oct 4, 2010 | 43 km SSW of Guantánamo, Cuba | M5.1 | 70 km | 32 km |
| Sep 30, 2016 | 46 km SSW of Maisí, Cuba | M5.0 | 49 km | 10 km |
| Mar 20, 2010 | 45 km SSW of Guantánamo, Cuba | M5.0 | 67 km | 10 km |
| Jan 5, 1999 | 24 km NE of Moa, Cuba | M4.9 | 83 km | 10 km |
| Jan 17, 2016 | 30 km SSW of El Cobre, Cuba | M4.9 | 136 km | 10 km |
| Jan 17, 2016 | 29 km SSW of El Cobre, Cuba | M4.9 | 132 km | 10 km |
| Dec 16, 1999 | 36 km SSE of Santiago de Cuba, Cuba | M4.8 | 102 km | 10 km |
| Jul 5, 2010 | 49 km SSW of Guantánamo, Cuba | M4.7 | 69 km | 24 km |
| Jan 5, 1999 | 23 km NE of Moa, Cuba | M4.7 | 84 km | 10 km |
| Apr 25, 2017 | 56 km SE of Santiago de Cuba, Cuba | M4.7 | 83 km | 23 km |
| Feb 8, 2013 | 42 km SSW of El Cobre, Cuba | M4.7 | 139 km | 8 km |
| Apr 29, 1990 | 43 km WNW of Môle Saint-Nicolas, Haiti | M4.7 | 109 km | 10 km |
| Oct 17, 2024 | 37 km S of El Cobre, Cuba | M4.6 | 128 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
15 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Melissa | Category 3 | 121 mph | 127 km |
| 2024 | Oscar | Category 1 | 86 mph | 36 km |
| 2020 | Isaias | Category 1 | 81 mph | 162 km |
| 2017 | Irma | Category 5 | 167 mph | 194 km |
| 2016 | Matthew | Category 4 | 150 mph | 54 km |
| 2012 | Sandy | Category 3 | 115 mph | 124 km |
| 2011 | Irene | Category 3 | 121 mph | 258 km |
| 2010 | Tomas | Category 1 | 86 mph | 94 km |
| 2008 | Ike | Category 4 | 132 mph | 120 km |
| 2008 | Hanna | Category 1 | 86 mph | 265 km |
| 2005 | Dennis | Category 4 | 138 mph | 220 km |
| 1998 | Georges | Category 1 | 81 mph | 33 km |
| 1988 | Gilbert | Category 4 | 132 mph | 278 km |
| 1985 | Kate | Category 2 | 109 mph | 193 km |
| 1980 | Allen | Category 5 | 161 mph | 218 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1887 | MOLE SAINT-NICOLAS | Earthquake | — | — | 59 km |
| 1775 | SANTIAGO DE CUBA | Earthquake | — | — | 126 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 77°F (25°C) | 3.7 in | |
| February | 73°F (23°C) | 2.8 in | Coldest, Driest |
| March | 74°F (24°C) | 2.9 in | |
| April | 76°F (25°C) | 4.0 in | |
| May | 78°F (25°C) | 7.7 in | |
| June | 79°F (26°C) | 5.2 in | |
| July | 80°F (27°C) | 4.3 in | |
| August | 80°F (27°C) | 5.3 in | Warmest |
| September | 80°F (26°C) | 6.1 in | |
| October | 78°F (26°C) | 9.1 in | Wettest |
| November | 76°F (25°C) | 6.1 in | |
| December | 74°F (23°C) | 4.9 in |
San Antonio del Sur has a seasonal temperature swing of 8°F / from 73°F in February to 80°F in August. Total annual precipitation is 62.1 inches, with October being the wettest month (9.1") and February the driest (2.8").