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Weather & Climate in Río Grande, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Río Grande has a warm climate with an average annual temperature of 77°F (25°C). Winters average 74°F in January while summers reach 79°F in July / relatively mild seasonal variation. The area gets 253 sunny days per year, above the national average. Annual precipitation totals 45.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 85 feet.
Temperature
74°F Jan (23°C)
79°F Jul (26°C)
| Annual Average | 76.7°F |
| 42% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 85 ft (26 m) |
| Area | 642.7 sq mi (1,664.6 km²) |
| Population Density | 20/sq mi |
| Coordinates | 16.0111°N, 97.4356°W |
| Timezone | America/Mexico_City |
Precipitation & Snow
Air Quality
Earthquake History
2,391 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Sep 30, 1999 | 15 km W of San Baltazar Loxicha, Mexico | M7.5 | 54 km | 61 km |
| Mar 20, 2012 | 6 km E of Santiago Llano Grande, Mexico | M7.4 | 100 km | 20 km |
| Feb 16, 2018 | 4 km S of Pinotepa de Don Luis, Mexico | M7.2 | 71 km | 22 km |
| Feb 25, 1996 | 24 km SSW of Santa María Chico Ometepec, Mexico | M7.1 | 68 km | 21 km |
| Jul 19, 1997 | 4 km ENE of El Ciruelo, Mexico | M6.9 | 91 km | 33 km |
| Jul 4, 1994 | 108 km SSW of La Barra de Colotepec, Mexico | M6.5 | 126 km | 15 km |
| Feb 3, 1998 | 2 km E of Benito Juárez, Mexico | M6.4 | 123 km | 33 km |
| Jun 30, 2010 | 2 km ESE of San Agustín Chayuco, Mexico | M6.3 | 57 km | 20 km |
| Feb 25, 1996 | 7 km SE of Santa María Chico Ometepec, Mexico | M6.2 | 54 km | 12 km |
| May 15, 1993 | 1 km ENE of Ometepec, Mexico | M6.1 | 128 km | 21 km |
| May 15, 1993 | 2 km SSW of Ometepec, Mexico | M6.0 | 128 km | 20 km |
| Apr 2, 2012 | 7 km SSW of Santa María Cortijo, Mexico | M6.0 | 103 km | 9 km |
| Nov 13, 1993 | 18 km SW of Montecillos, Mexico | M6.0 | 132 km | 20 km |
| Mar 19, 1996 | 21 km WSW of Bajos de Chila, Mexico | M5.9 | 23 km | 33 km |
| Feb 19, 2018 | 4 km SSE of Santiago Tetepec, Mexico | M5.9 | 44 km | 22 km |
| Jun 14, 2004 | 0 km W of Santa Catarina Mechoacán, Mexico | M5.9 | 57 km | 10 km |
| Feb 17, 2018 | 8 km SE of José María Morelos, Mexico | M5.8 | 49 km | 3 km |
| May 8, 2016 | 3 km WNW of San Agustín Chayuco, Mexico | M5.8 | 62 km | 22 km |
| Apr 1, 1991 | 11 km SW of Corralero, Mexico | M5.8 | 92 km | 21 km |
| Mar 10, 2014 | 26 km SW of Corralero, Mexico | M5.8 | 96 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
17 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Erick | Category 4 | 138 mph | 51 km |
| 2024 | John | Category 3 | 121 mph | 125 km |
| 2023 | Otis | Category 5 | 167 mph | 234 km |
| 2022 | Bonnie | Category 2 | 98 mph | 279 km |
| 2022 | Agatha | Category 2 | 109 mph | 89 km |
| 2017 | Max | Category 1 | 92 mph | 174 km |
| 2015 | Carlos | Category 1 | 86 mph | 279 km |
| 2012 | Carlotta | Category 2 | 109 mph | 18 km |
| 2011 | Hilary | Category 3 | 104 mph | 168 km |
| 2006 | John | Category 3 | 115 mph | 240 km |
| 1998 | Lester | Category 2 | 104 mph | 168 km |
| 1997 | Pauline | Category 4 | 132 mph | 18 km |
| 1997 | Rick | Category 2 | 98 mph | 25 km |
| 1996 | Douglas | Category 1 | 86 mph | 260 km |
| 1996 | Boris | Category 1 | 75 mph | 296 km |
| 1989 | Cosme | Category 1 | 86 mph | 183 km |
| 1984 | Boris | Category 1 | 75 mph | 293 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
8 tsunamis recorded within 500 km. Highest wave on record: 4.0 m (13 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1787 | SAN MARCOS | Earthquake | 4.0 m | 11 | 126 km |
| 1950 | S. MEXICO | Earthquake | 0.3 m | — | 99 km |
| 2012 | S. MEXICO | Earthquake | 0.2 m | 2 | 100 km |
| 1928 | S. MEXICO | Earthquake | 0.2 m | 4 | 43 km |
| 1996 | MEXICO | Earthquake | 0.1 m | — | 68 km |
| 1968 | ACAPULCO | Earthquake | — | 18 | 65 km |
| 1928 | MEXICO | Earthquake | — | — | 148 km |
| 1870 | PUERTO ANGEL, MEXICO | Earthquake | — | 24 | 139 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 0.2 in | |
| February | 74°F (23°C) | 0.3 in | Coldest |
| March | 76°F (25°C) | 0.2 in | |
| April | 78°F (26°C) | 0.4 in | |
| May | 80°F (26°C) | 3.0 in | Warmest |
| June | 79°F (26°C) | 8.9 in | |
| July | 79°F (26°C) | 7.3 in | |
| August | 78°F (26°C) | 10.1 in | |
| September | 78°F (25°C) | 10.6 in | Wettest |
| October | 77°F (25°C) | 4.4 in | |
| November | 76°F (24°C) | 0.6 in | |
| December | 74°F (23°C) | 0.1 in | Driest |
Río Grande has a seasonal temperature swing of 6°F / from 74°F in February to 80°F in May. Total annual precipitation is 45.9 inches, with September being the wettest month (10.6") and December the driest (0.1").