All Countries
Weather & Climate in San Marcos, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Marcos experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 45°F in January while summers reach 47°F in July / relatively mild seasonal variation. The area gets 333 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 94.1 inches (wetter than the 38-inch national average). The area receives 3.4 inches of snow annually. The city sits at an elevation of 9,741 feet.
Temperature
45°F Jan (7°C)
47°F Jul (8°C)
| Annual Average | 46.9°F |
| 13% below US avg | |
| January Average | 45°F (7°C) |
| July Average | 47°F (8°C) |
| Sunny Days | 333 days/yr |
Geography
| Elevation | 9,741 ft (2,969 m) |
| Area | 159.3 sq mi (412.5 km²) |
| Population Density | 0/sq mi |
| Coordinates | -9.5249°N, 77.1568°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
57 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.7.
| Jan 3, 2010 | 16 km E of Huallanca, Peru | M5.7 | 101 km | 117 km |
| Oct 4, 1998 | 9 km E of Uchiza, Peru | M5.5 | 146 km | 33 km |
| Jun 5, 2008 | 30 km S of Uchiza, Peru | M5.2 | 118 km | 126 km |
| Mar 28, 2010 | 14 km SE of Huarmey, Peru | M5.2 | 121 km | 65 km |
| Oct 19, 1992 | 30 km S of Puerto Casma, Peru | M5.1 | 140 km | 53 km |
| Mar 15, 1996 | 17 km ENE of Caraz, Peru | M5.0 | 82 km | 29 km |
| Apr 19, 2025 | 23 km SW of Tingo María, Peru | M4.9 | 111 km | 113 km |
| Aug 13, 2019 | 12 km WNW of Ticllos, Peru | M4.9 | 76 km | 15 km |
| Jul 17, 2023 | 17 km ESE of Tingo María, Peru | M4.8 | 143 km | 10 km |
| Sep 3, 2019 | 50 km NNW of Tingo María, Peru | M4.8 | 127 km | 118 km |
| Aug 7, 2012 | 31 km NW of Tingo María, Peru | M4.8 | 119 km | 120 km |
| Jan 6, 2002 | 25 km NNE of Tingo María, Peru | M4.8 | 145 km | 33 km |
| Feb 25, 2007 | 18 km SE of Tingo María, Peru | M4.7 | 142 km | 52 km |
| Aug 17, 1998 | 2 km NNE of Llacllin, Peru | M4.7 | 77 km | 92 km |
| Sep 25, 2012 | 33 km N of Tingo María, Peru | M4.7 | 142 km | 128 km |
| Aug 1, 2016 | 36 km NE of Arancay, Peru | M4.7 | 96 km | 129 km |
| Oct 15, 2024 | 6 km N of Pativilca, Peru | M4.6 | 142 km | 92 km |
| Mar 14, 2012 | 25 km ESE of Ambo, Peru | M4.6 | 149 km | 118 km |
| Feb 23, 2023 | 22 km SW of Quiches, Peru | M4.6 | 119 km | 67 km |
| Sep 10, 2003 | 9 km NE of Churubamba, Peru | M4.6 | 120 km | 134 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 23.0 m (75 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2010 | 513 LAKE, HUALCAN GLACIER | Meteorological | 23.0 m | 1 | 60 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 4.3 in | |
| February | 47°F (8°C) | 4.8 in | |
| March | 47°F (8°C) | 5.9 in | Wettest |
| April | 47°F (8°C) | 3.5 in | |
| May | 45°F (7°C) | 1.5 in | |
| June | 44°F (7°C) | 0.5 in | Coldest, Driest |
| July | 47°F (8°C) | 0.5 in | |
| August | 44°F (7°C) | 0.8 in | |
| September | 45°F (7°C) | 1.5 in | |
| October | 46°F (8°C) | 3.0 in | |
| November | 47°F (8°C) | 3.7 in | Warmest |
| December | 47°F (8°C) | 3.6 in |
San Marcos has a seasonal temperature swing of 3°F / from 44°F in June to 47°F in November. Total annual precipitation is 33.6 inches, with March being the wettest month (5.9") and June the driest (0.5").