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San Juan, Peru

Full City Profile

12,795 Population 12/sq mi density
75 ft Elevation 23 meters
66°F Avg Temperature 19°C
San Juan enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 72°F in January while summers reach 61°F in July. The area gets 336 sunny days per year. Annual precipitation totals 0.1 inches. The area receives 0.0 inches of snow annually.

Temperature

72°F Jan (22°C) 61°F Jul (16°C)
Annual Average66.4°F
23% above US avg
January Average72°F (22°C)
July Average61°F (16°C)
Sunny Days336 days/yr

Geography

Elevation75 ft (23 m)
Area1,064.2 sq mi (2,756.2 km²)
Population Density12/sq mi
Coordinates-15.3653°N, 75.1622°W
TimezoneAmerica/Lima

Precipitation & Snow

Annual Rainfall 0.1"
100% below US avg
Snowfall 0.0"
Wettest Month (Jan) 0.04"
Driest Month (Jan) 0.04"

Air Quality

Earthquake History

648 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.7. Most recent: M4.4 on Jul 23, 2025.

Nov 12, 1996 60 km SW of Changuillo, Peru M7.7 69 km
Jun 28, 2024 10 km WSW of Atiquipa, Peru M7.2 92 km
Sep 25, 2013 16 km WSW of Atiquipa, Peru M7.1 87 km
Jan 14, 2018 37 km W of Atiquipa, Peru M7.1 66 km
Jul 5, 2001 31 km S of Achanizo, Peru M6.6 149 km
Jan 30, 2012 6 km ESE of Pampa de Tate, Peru M6.4 143 km
Apr 5, 1991 21 km ESE of Pampa de Tate, Peru M6.3 132 km
Jun 29, 2024 34 km SW of Atiquipa, Peru M6.1 100 km
Nov 13, 1996 54 km WSW of Changuillo, Peru M6.1 81 km
Nov 13, 1996 29 km WSW of San Juan, Peru M6.0 30 km
Jun 16, 2024 10 km SW of Atiquipa, Peru M6.0 95 km
Jul 1, 1991 50 km SSE of San Juan, Peru M6.0 51 km
May 3, 2005 central Peru M5.9 76 km
May 17, 2025 5 km W of San Pedro, Peru M5.9 128 km
Feb 18, 2014 10 km ESE of Pampa de Tate, Peru M5.9 142 km
May 18, 2009 35 km SW of Acarí, Peru M5.8 48 km
Jun 28, 2007 41 km SW of Acarí, Peru M5.8 45 km
Sep 28, 2004 21 km WNW of Atiquipa, Peru M5.8 77 km
Jun 29, 2015 27 km SSE of Atiquipa, Peru M5.8 122 km
Jul 12, 2024 24 km SW of Acarí, Peru M5.8 44 km
Source: USGS (M2.5+, 1990–2025)

Tsunami History

5 tsunamis recorded within 500 km. Highest wave on record: 2.0 m (7 ft).

Year Location Cause Max Wave Deaths Distance
1942 S. PERU Eruption + Earthquake 2.0 m 30 99 km
1996 S. PERU Earthquake 0.4 m 14 69 km
2024 S. PERU Earthquake 0.2 m — 91 km
2018 S. PERU Earthquake 0.2 m — 66 km
2013 S. PERU Earthquake 0.1 m — 87 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 72°F (22°C) 0.0 in Wettest
February 73°F (23°C) 0.0 in Warmest, Driest
March 72°F (22°C) 0.0 in
April 70°F (21°C) 0.0 in
May 66°F (19°C) 0.0 in
June 63°F (17°C) 0.0 in
July 61°F (16°C) 0.0 in
August 61°F (16°C) 0.0 in Coldest
September 61°F (16°C) 0.0 in
October 64°F (18°C) 0.0 in
November 66°F (19°C) 0.0 in
December 70°F (21°C) 0.0 in

San Juan has a seasonal temperature swing of 13°F / from 61°F in August to 73°F in February. Total annual precipitation is 0.1 inches, with January being the wettest month (0.0") and February the driest (0.0").

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