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Río Blanco, Puerto Rico

Full City Profile

1,406 Population 1,826/sq mi density
59 ft Elevation 18 meters
78°F Avg Temperature 26°C
Río Blanco has a warm climate with an average annual temperature of 78°F (26°C). Winters average 74°F in January while summers reach 81°F in July. The area gets 351 sunny days per year. Annual precipitation totals 50.0 inches. The area receives 0.0 inches of snow annually.

Temperature

74°F Jan (24°C) 81°F Jul (27°C)
Annual Average78.3°F
45% above US avg
January Average74°F (24°C)
July Average81°F (27°C)
Sunny Days351 days/yr

Geography

Elevation59 ft (18 m)
Area0.8 sq mi (2.0 km²)
Population Density1,826/sq mi
Coordinates18.2183°N, 65.7885°W
TimezoneAmerica/Puerto_Rico

Precipitation & Snow

Annual Rainfall 50.0"
32% above US avg
Snowfall 0.0"
Wettest Month (Oct) 9.25"
Driest Month (Feb) 3.35"

Air Quality

Earthquake History

20,805 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.4. Most recent: M0.0 on Aug 30, 2025.

Jan 13, 2014 61 km N of Hatillo, Puerto Rico M6.4 141 km
Jan 7, 2020 4 km SSE of Indios, Puerto Rico M6.4 112 km
Jan 11, 2020 5 km SE of Maria Antonia, Puerto Rico M5.9 116 km
May 16, 2010 4 km E of Moca, Puerto Rico M5.8 137 km
Jan 6, 2020 14 km S of Indios, Puerto Rico M5.8 116 km
Jan 7, 2020 0 km NW of Magas Arriba, Puerto Rico M5.6 107 km
Jan 7, 2020 11 km S of Tallaboa, Puerto Rico M5.6 105 km
Feb 4, 2008 Puerto Rico region M5.5 148 km
May 2, 2020 6 km S of Tallaboa, Puerto Rico M5.4 104 km
Jul 3, 2020 9 km SSE of La Parguera, Puerto Rico M5.3 133 km
Aug 1, 1993 68 km SSE of Emajagua, Puerto Rico M5.3 91 km
Jan 15, 2020 Puerto Rico region M5.2 134 km
Jan 10, 2020 4 km S of Maria Antonia, Puerto Rico M5.2 120 km
Jan 11, 2020 19 km S of Indios, Puerto Rico M5.2 115 km
Mar 12, 2009 66 km N of Brenas, Puerto Rico M5.1 113 km
Sep 6, 2004 122 km NNE of Vieques, Puerto Rico M5.1 142 km
May 11, 1996 107 km N of Charlotte Amalie, U.S. Virgin Islands M5.1 150 km
Aug 14, 2009 92 km N of Suárez, Puerto Rico M5.1 116 km
Jan 25, 2020 1 km N of Indios, Puerto Rico M5.0 111 km
Jan 7, 2020 7 km SE of Tallaboa, Puerto Rico M5.0 99 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

27 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 5.

Year Name Category Closest
2025 Erin Category 5 218 km
2024 Ernesto Category 1 239 km
2023 Tammy Category 1 281 km
2022 Fiona Category 1 118 km
2019 Dorian Category 1 75 km
2017 Maria Category 5 27 km
2017 Irma Category 5 86 km
2017 Jose Category 4 298 km
2014 Gonzalo Category 3 204 km
2011 Irene Category 1 12 km
2010 Earl Category 4 159 km
2008 Omar Category 4 155 km
2004 Frances Category 4 243 km
2004 Jeanne Category 1 237 km
2000 Debby Category 1 77 km
1999 Lenny Category 4 139 km
1999 Jose Category 1 211 km
1998 Georges Category 3 13 km
1996 Bertha Category 3 92 km
1996 Hortense Category 1 102 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 15.2 m (50 ft).

Year Location Cause Max Wave Deaths Distance
1867 VIRGIN ISLANDS Earthquake 15.2 m 24 83 km
1868 VIRGIN ISLANDS Earthquake 1.5 m 74 km
2020 PUERTO RICO Earthquake 0.1 m 4 112 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Wildfire History

6 wildfires (100+ acres) within 100 km. Largest: CAMPAMENTO SANTIAGO (3,927 ac, 2005).

Year Name Acres Distance
2005 CAMPAMENTO SANTIAGO 3,927 55 km
2007 UNNAMED 3,896 56 km
2005 UNNAMED 1,888 50 km
2005 PISTA DE SALINAS CARR 3 1,137 60 km
2005 UNNAMED 725 46 km
2013 PUERTO NEGRO 631 47 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 74°F (24°C) 5.0 in
February 72°F (22°C) 3.4 in Coldest, Driest
March 73°F (23°C) 3.7 in
April 74°F (24°C) 5.3 in
May 76°F (25°C) 8.9 in
June 78°F (25°C) 6.5 in
July 81°F (27°C) 6.6 in Warmest
August 78°F (26°C) 8.3 in
September 78°F (26°C) 8.8 in
October 77°F (25°C) 9.3 in Wettest
November 76°F (24°C) 8.3 in
December 73°F (23°C) 6.9 in

Río Blanco has a seasonal temperature swing of 9°F / from 72°F in February to 81°F in July. Total annual precipitation is 81.0 inches, with October being the wettest month (9.3") and February the driest (3.4").

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