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Weather & Climate in Río San Juan, Dominican Republic
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Río San Juan has a warm climate with an average annual temperature of 78°F (25°C). Winters average 74°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 205 sunny days per year. Annual precipitation totals 72.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
74°F Jan (23°C)
80°F Jul (27°C)
| Annual Average | 77.8°F |
| 44% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 205 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 164.4 sq mi (425.8 km²) |
| Population Density | 55/sq mi |
| Coordinates | 19.6439°N, 70.0764°W |
| Timezone | America/Santo_Domingo |
Precipitation & Snow
Air Quality
Earthquake History
593 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Sep 22, 2003 | 2 km SE of Puerto Plata, Dominican Republic | M6.4 | 64 km | 10 km |
| Mar 26, 1991 | 10 km ESE of Cabarete, Dominican Republic | M5.8 | 26 km | 33 km |
| Sep 22, 2003 | 17 km N of Sosúa, Dominican Republic | M5.6 | 54 km | 10 km |
| Jul 12, 1994 | 3 km N of Guananico, Dominican Republic | M5.6 | 90 km | 33 km |
| Jan 5, 2012 | 5 km NNW of Baní, Dominican Republic | M5.5 | 150 km | 40 km |
| Oct 11, 1990 | 11 km ESE of El Puerto, Dominican Republic | M5.3 | 126 km | 101 km |
| Aug 19, 1993 | 11 km SSW of El Cacao, Dominican Republic | M5.3 | 138 km | 23 km |
| Aug 10, 1998 | 11 km NNW of San José de Ocoa, Dominican Republic | M5.2 | 121 km | 58 km |
| Jan 23, 2012 | 11 km S of Río San Juan, Dominican Republic | M5.1 | 11 km | 9 km |
| Apr 24, 1996 | 4 km N of Piedra Blanca, Dominican Republic | M5.1 | 88 km | 83 km |
| Jun 8, 2007 | 1 km S of Piedra Blanca, Dominican Republic | M5.0 | 94 km | 112 km |
| Jan 18, 1995 | 5 km NNW of Piedra Blanca, Dominican Republic | M5.0 | 88 km | 91 km |
| Jul 15, 2013 | 7 km E of San Francisco de Macorís, Dominican Republic | M4.9 | 41 km | 38 km |
| Oct 28, 2003 | 2 km SW of Puerto Plata, Dominican Republic | M4.9 | 68 km | 10 km |
| Oct 29, 2017 | 8 km SSE of San José de Ocoa, Dominican Republic | M4.9 | 137 km | 23 km |
| Mar 26, 1991 | 10 km NNE of Cabarete, Dominican Republic | M4.8 | 37 km | 14 km |
| Sep 22, 2003 | Dominican Republic region | M4.8 | 63 km | 10 km |
| Oct 16, 2003 | 3 km S of Puerto Plata, Dominican Republic | M4.8 | 66 km | 10 km |
| Sep 22, 2003 | 5 km E of Guananico, Dominican Republic | M4.8 | 84 km | 10 km |
| May 18, 2023 | Dominican Republic region | M4.8 | 77 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
19 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Erin | Category 4 | 127 mph | 289 km |
| 2024 | Oscar | Category 1 | 86 mph | 203 km |
| 2024 | Ernesto | Category 1 | 81 mph | 270 km |
| 2022 | Fiona | Category 3 | 115 mph | 41 km |
| 2020 | Isaias | Category 1 | 81 mph | 121 km |
| 2017 | Irma | Category 5 | 167 mph | 103 km |
| 2017 | Maria | Category 3 | 127 mph | 111 km |
| 2011 | Irene | Category 3 | 109 mph | 64 km |
| 2010 | Earl | Category 4 | 132 mph | 277 km |
| 2008 | Ike | Category 4 | 132 mph | 175 km |
| 2004 | Frances | Category 4 | 138 mph | 219 km |
| 2004 | Jeanne | Category 1 | 81 mph | 147 km |
| 2000 | Debby | Category 1 | 75 mph | 208 km |
| 1998 | Georges | Category 3 | 121 mph | 106 km |
| 1998 | Bonnie | Category 1 | 86 mph | 274 km |
| 1996 | Hortense | Category 3 | 115 mph | 79 km |
| 1996 | Bertha | Category 3 | 115 mph | 208 km |
| 1987 | Emily | Category 3 | 121 mph | 166 km |
| 1985 | Kate | Category 1 | 92 mph | 195 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 5.0 m (16 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1946 | NORTHEASTERN COAST | Earthquake | 5.0 m | 1,790 | 121 km |
| 1946 | NORTHEASTERN COAST | Earthquake | 0.6 m | 75 | 63 km |
| 1989 | PUERTO RICO | Earthquake | 0.1 m | — | 150 km |
| 1751 | AZUA DE COMPOSTELA | Earthquake | — | — | 143 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 5.4 in | Coldest |
| February | 75°F (24°C) | 3.8 in | Driest |
| March | 76°F (24°C) | 4.1 in | |
| April | 77°F (25°C) | 5.7 in | |
| May | 79°F (26°C) | 7.6 in | |
| June | 80°F (27°C) | 4.3 in | |
| July | 80°F (27°C) | 4.8 in | Warmest |
| August | 80°F (27°C) | 6.3 in | |
| September | 80°F (27°C) | 5.0 in | |
| October | 80°F (27°C) | 6.4 in | |
| November | 77°F (25°C) | 10.2 in | Wettest |
| December | 75°F (24°C) | 8.7 in |
Río San Juan has a seasonal temperature swing of 6°F / from 74°F in January to 80°F in July. Total annual precipitation is 72.3 inches, with November being the wettest month (10.2") and February the driest (3.8").