San Dionisio del Mar, Mexico
Oaxaca · Mexico
San Dionisio del Mar is a small town in Oaxaca, Mexico with a population of 3,140. Elevation: 62 ft (19 m). Average temperature: 81°F (27°C).
Population source: Wikidata (dated census and official estimates), GeoNames. Climate: WorldClim 2.1 normals (1970-2000), NASA POWER. Updated August 2026
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About San Dionisio del Mar
San Dionisio del Mar is a town and municipality in Oaxaca in south-western Mexico.
It is part of the Juchitán District in the east of the Istmo de Tehuantepec region.
The town is named after its patron saint.
People
Climate
| Population | 3,140 |
| Population Density | 63 / sq mi |
| Elevation | 62 ft (19 m) |
| Coordinates | 16.3237°, -94.7583° |
| Timezone | America/Mexico_City |
| Country | 🇲🇽 Mexico |
| State / Province | Oaxaca |
| Average Temperature | 81°F (27°C) |
| January Average | 76°F (25°C) |
| July Average | 83°F (28°C) |
| Annual Precipitation | 37.2 inches (944 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
About San Dionisio del Mar
San Dionisio del Mar is a small town in Mexico (Oaxaca) with a population of 3,140. The city sits at an elevation of 62 feet (19 meters) above sea level. The average annual temperature is 81°F (27°C). Temperatures range from 76°F in January to 83°F in July. Annual precipitation averages 37.2 inches. The timezone is America/Mexico_City.
Temperature
| Annual Average | 80.6°F |
| 49% above Mexico avg | |
| January Average | 76°F (25°C) |
| July Average | 83°F (28°C) |
Geography
| Elevation | 62 ft (19 m) |
| Area | 50.0 sq mi (129.6 km²) |
| Population Density | 63/sq mi |
| Coordinates | 16.3237°N, 94.7583°W |
| Timezone | America/Mexico_City |
Precipitation & Snow
Air Quality
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 1.6 m (5 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2020 | OFF COAST OF OAXACA | Earthquake | 1.6 m | 10 | 142 km |
| 1965 | MEXICO | Earthquake | 0.4 m | 6 | 111 km |
| 2022 | S. MEXICO | Earthquake | 0.2 m | - | 129 km |
| 2025 | OFF COAST OF OAXACA | Earthquake | 0.2 m | - | 67 km |
Nearby Volcanoes
1 volcano within 200 km. Closest: Chichon, El (200 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Chichon, El | Lava dome(s) | 1,150 m (3,773 ft) | 1982 | 200 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 76°F (25°C) | 0.0 in | Coldest, Driest |
| February | 77°F (25°C) | 0.2 in | |
| March | 80°F (27°C) | 0.1 in | |
| April | 83°F (28°C) | 0.3 in | |
| May | 84°F (29°C) | 2.8 in | Warmest |
| June | 83°F (28°C) | 7.9 in | |
| July | 83°F (28°C) | 5.4 in | |
| August | 82°F (28°C) | 8.0 in | |
| September | 81°F (27°C) | 9.7 in | Wettest |
| October | 81°F (27°C) | 2.3 in | |
| November | 79°F (26°C) | 0.5 in | |
| December | 77°F (25°C) | 0.0 in |
San Dionisio del Mar has a seasonal temperature swing of 8°F / from 76°F in January to 84°F in May. Total annual precipitation is 37.2 inches, with September being the wettest month (9.7") and January the driest (0.0").
Farmers Markets in San Dionisio del Mar
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| Mercado municipal |
Airports Near San Dionisio del Mar
4 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| General Antonio Cárdenas Rodríguez National Airport / Ixtepec Air Base | IZT | Medium Airport |
| C.P.A. Leonardo López Hernandez Airport | - | Small Airport |
| Estación Aeronaval de Salina Cruz | SCX | Small Airport |
| Llano Grande Airport | - | Small Airport |
Quick Facts
🇲🇽 About Mexico
Public Holidays in Mexico
9 public holidays this year
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Get ReportFrequently Asked Questions About San Dionisio del Mar
What is the population of San Dionisio del Mar?
San Dionisio del Mar has a population of 3,140 residents and is located in Mexico. The population density is 63 people per square mile, spread across 50.0 square miles.
What is the weather like in San Dionisio del Mar?
San Dionisio del Mar has a warm climate with an average annual temperature of 81°F (27°C). Winter temperatures average 76°F in January, while summers reach an average of 83°F in July. Annual rainfall totals 37.2 inches.
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