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Weather & Climate in San Mateo, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Mateo enjoys a temperate climate with an average annual temperature of 68°F (20°C). Winters average 84°F in January while summers reach 70°F in July / relatively mild seasonal variation. The area gets 344 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 53.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 10,364 feet.
Temperature
84°F Jan (29°C)
70°F Jul (21°C)
| Annual Average | 68.3°F |
| 26% above US avg | |
| January Average | 84°F (29°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 344 days/yr |
Geography
| Elevation | 10,364 ft (3,159 m) |
| Area | 94.8 sq mi (245.5 km²) |
| Population Density | 39/sq mi |
| Coordinates | -11.7594°N, 76.3006°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
186 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.3.
| Apr 18, 1993 | 15 km SE of Lachaqui, Peru | M6.3 | 28 km | 106 km |
| Jun 23, 2021 | 11 km WSW of Mala, Peru | M5.9 | 115 km | 50 km |
| Jan 7, 2022 | 6 km NW of Cocachacra, Peru | M5.6 | 32 km | 96 km |
| May 28, 2003 | 33 km SSW of Santiago de Surco, Peru | M5.6 | 118 km | 43 km |
| Jun 21, 1995 | 28 km W of Chancay, Peru | M5.6 | 136 km | 71 km |
| Oct 1, 1996 | 19 km SSW of Chilca, Peru | M5.6 | 117 km | 62 km |
| Jun 15, 2025 | 37 km WSW of Callao, Peru | M5.6 | 133 km | 40 km |
| Oct 4, 1999 | 21 km ENE of Paucartambo, Peru | M5.6 | 140 km | 33 km |
| Nov 25, 2013 | 12 km SE of Omas, Peru | M5.5 | 94 km | 77 km |
| Dec 25, 1998 | 9 km SE of Chancay, Peru | M5.4 | 100 km | 67 km |
| May 12, 2022 | 9 km W of San Bartolo, Peru | M5.4 | 93 km | 53 km |
| Feb 17, 2005 | 7 km W of Carhuamayo, Peru | M5.4 | 95 km | 126 km |
| Nov 6, 1992 | 18 km NNW of Mucllo, Peru | M5.3 | 131 km | 14 km |
| Mar 18, 1999 | 21 km NNE of Huancaya, Peru | M5.3 | 72 km | 116 km |
| Mar 29, 2008 | 14 km SSW of Callao, Peru | M5.3 | 105 km | 51 km |
| Jun 3, 2014 | 20 km W of Chilca, Peru | M5.2 | 108 km | 36 km |
| Feb 15, 2024 | 13 km NW of Chancay, Peru | M5.2 | 119 km | 67 km |
| May 17, 2018 | 7 km E of Mala, Peru | M5.2 | 105 km | 56 km |
| Aug 1, 2009 | 8 km SSW of Chambara, Peru | M5.2 | 104 km | 101 km |
| Mar 20, 1998 | 54 km W of Callao, Peru | M5.2 | 149 km | 49 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 30.0 m (98 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1971 | CHUNGAR | Meteorological | 30.0 m | 600 | 74 km |
| 1746 | CENTRAL PERU | Earthquake | 24.0 m | 5,941 | 101 km |
| 1865 | CENTRAL PERU | Earthquake | 2.0 m | 5 | 91 km |
| 1806 | CENTRAL PERU | Earthquake | 1.0 m | — | 95 km |
| 1878 | CENTRAL PERU | Unknown | — | 5 | 81 km |
| 1860 | CENTRAL PERU | Earthquake | — | — | 95 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 84°F (29°C) | 3.8 in | Warmest |
| February | 47°F (8°C) | 5.0 in | |
| March | 47°F (8°C) | 5.2 in | Wettest |
| April | 46°F (8°C) | 2.0 in | |
| May | 44°F (6°C) | 0.4 in | |
| June | 41°F (5°C) | 0.1 in | Driest |
| July | 70°F (21°C) | 0.1 in | |
| August | 41°F (5°C) | 0.2 in | Coldest |
| September | 43°F (6°C) | 0.6 in | |
| October | 45°F (7°C) | 1.4 in | |
| November | 45°F (7°C) | 1.4 in | |
| December | 46°F (8°C) | 2.7 in |
San Mateo has a seasonal temperature swing of 43°F / from 41°F in August to 84°F in January. Total annual precipitation is 22.9 inches, with March being the wettest month (5.2") and June the driest (0.1").