San Juan, Puerto Rico

Full City Profile

418,140 Population 9,010/sq mi density

23 ft Elevation 7 meters

81°F Avg Temperature 27°C

San Juan has a warm climate with an average annual temperature of 81°F (27°C). Winters average 76°F in January while summers reach 83°F in July. The area gets 354 sunny days per year. Annual precipitation totals 38.2 inches. The area receives 0.0 inches of snow annually.

Temperature

76°F Jan (25°C) 83°F Jul (28°C)

Annual Average	80.6°F
	49% above US avg
January Average	76°F (25°C)
July Average	83°F (28°C)
Sunny Days	354 days/yr

Geography

Elevation	23 ft (7 m)
Area	46.4 sq mi (120.2 km²)
Population Density	9,010/sq mi
Coordinates	18.4663°N, 66.1057°W
Timezone	America/Puerto_Rico

Precipitation & Snow

Annual Rainfall 38.2"

0% below US avg

Snowfall 0.0"

Wettest Month (Nov) 7.40"

Driest Month (Feb) 2.99"

Air Quality

Earthquake History

23,079 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	98 km
Jan 7, 2020	4 km SSE of Indios, Puerto Rico	M6.4	94 km
Sep 24, 2019	67 km NNW of San Antonio, Puerto Rico	M6.0	140 km
Jan 11, 2020	5 km SE of Maria Antonia, Puerto Rico	M5.9	98 km
Jan 6, 2020	14 km S of Indios, Puerto Rico	M5.8	101 km
May 16, 2010	4 km E of Moca, Puerto Rico	M5.8	102 km
Jan 7, 2020	11 km S of Tallaboa, Puerto Rico	M5.6	91 km
Jan 7, 2020	0 km NW of Magas Arriba, Puerto Rico	M5.6	86 km
Feb 4, 2008	Puerto Rico region	M5.5	105 km
Dec 11, 2000	65 km N of Isabela, Puerto Rico	M5.5	125 km
May 2, 2020	6 km S of Tallaboa, Puerto Rico	M5.4	88 km
Aug 1, 1993	68 km SSE of Emajagua, Puerto Rico	M5.3	126 km
Jul 3, 2020	9 km SSE of La Parguera, Puerto Rico	M5.3	114 km
Nov 23, 1992	28 km NNW of San Antonio, Puerto Rico	M5.3	116 km
Jan 11, 2020	19 km S of Indios, Puerto Rico	M5.2	102 km
Jan 15, 2020	Puerto Rico region	M5.2	114 km
Jan 10, 2020	4 km S of Maria Antonia, Puerto Rico	M5.2	101 km
Aug 14, 2009	92 km N of Suárez, Puerto Rico	M5.1	97 km
Sep 6, 2004	122 km NNE of Vieques, Puerto Rico	M5.1	134 km
Mar 12, 2009	66 km N of Brenas, Puerto Rico	M5.1	73 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year	Name	Category	Closest
2025	Erin	Category 5	205 km
2024	Ernesto	Category 1	197 km
2023	Tammy	Category 1	293 km
2022	Fiona	Category 1	112 km
2019	Dorian	Category 1	80 km
2017	Maria	Category 5	31 km
2017	Irma	Category 5	82 km
2017	Jose	Category 4	294 km
2014	Gonzalo	Category 3	210 km
2011	Irene	Category 1	34 km
2010	Earl	Category 4	152 km
2008	Omar	Category 4	199 km
2004	Frances	Category 4	219 km
2004	Jeanne	Category 1	200 km
2000	Debby	Category 1	59 km
1999	Lenny	Category 4	182 km
1999	Jose	Category 1	247 km
1998	Georges	Category 3	36 km
1996	Bertha	Category 3	87 km
1996	Hortense	Category 1	99 km

Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

5 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	120 km
1918	PUERTO RICO: MONA PASSAGE	Eruption + Earthquake	6.1 m	144	117 km
1868	VIRGIN ISLANDS	Earthquake	1.5 m	—	114 km
2020	PUERTO RICO	Earthquake	0.1 m	4	94 km
1918	PUERTO RICO	Earthquake	—	—	117 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	52 km
2007	UNNAMED	3,896	52 km
2005	UNNAMED	1,888	52 km
2005	PISTA DE SALINAS CARR 3	1,137	56 km
2005	UNNAMED	725	57 km
2013	PUERTO NEGRO	631	88 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	76°F (25°C)	4.3 in
February	76°F (24°C)	3.0 in	Coldest, Driest
March	76°F (25°C)	3.2 in
April	78°F (26°C)	4.4 in
May	80°F (27°C)	7.2 in
June	81°F (27°C)	5.3 in
July	83°F (28°C)	6.1 in	Warmest
August	82°F (28°C)	7.3 in
September	81°F (27°C)	6.5 in
October	81°F (27°C)	6.7 in
November	79°F (26°C)	7.4 in	Wettest
December	77°F (25°C)	6.1 in

San Juan has a seasonal temperature swing of 8°F / from 76°F in February to 83°F in July. Total annual precipitation is 67.6 inches, with November being the wettest month (7.4") and February the driest (3.0").

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