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Weather & Climate in Mallay, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mallay has a cool climate with an average annual temperature of 42°F (6°C). Winters average 40°F in January while summers reach 41°F in July / relatively mild seasonal variation. The area gets 348 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 83.1 inches (wetter than the 38-inch national average). The area receives 58.6 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 11,923 feet.
Temperature
40°F Jan (5°C)
41°F Jul (5°C)
| Annual Average | 41.9°F |
| 22% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 41°F (5°C) |
| Sunny Days | 348 days/yr |
Geography
| Elevation | 11,923 ft (3,634 m) |
| Area | 457.0 sq mi (1,183.6 km²) |
| Population Density | 1/sq mi |
| Coordinates | -10.7228°N, 76.8718°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
119 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 | 110 km | 106 km |
| Apr 29, 1991 | 18 km SSW of Huacho, Peru | M5.9 | 106 km | 58 km |
| Jan 7, 2022 | 6 km NW of Cocachacra, Peru | M5.6 | 131 km | 96 km |
| Jun 21, 1995 | 28 km W of Chancay, Peru | M5.6 | 116 km | 71 km |
| Oct 4, 1999 | 21 km ENE of Paucartambo, Peru | M5.6 | 135 km | 33 km |
| Feb 17, 2005 | 7 km W of Carhuamayo, Peru | M5.4 | 87 km | 126 km |
| Dec 25, 1998 | 9 km SE of Chancay, Peru | M5.4 | 108 km | 67 km |
| Apr 1, 2015 | 30 km WNW of Paramonga, Peru | M5.3 | 134 km | 48 km |
| Feb 15, 2024 | 13 km NW of Chancay, Peru | M5.2 | 100 km | 67 km |
| Jul 18, 2016 | 17 km SW of Caleta de Carquín, Peru | M5.2 | 109 km | 75 km |
| Mar 28, 2010 | 14 km SE of Huarmey, Peru | M5.2 | 144 km | 65 km |
| Mar 31, 2022 | 40 km W of Caleta de Carquín, Peru | M5.1 | 132 km | 52 km |
| May 12, 2020 | 37 km WNW of Paramonga, Peru | M5.0 | 143 km | 73 km |
| Jul 28, 2007 | 34 km SW of Supe Puerto, Peru | M5.0 | 124 km | 51 km |
| Aug 13, 2019 | 12 km WNW of Ticllos, Peru | M4.9 | 74 km | 15 km |
| May 22, 2018 | 13 km WSW of Végueta, Peru | M4.9 | 104 km | 66 km |
| Dec 31, 2012 | 16 km W of Sayán, Peru | M4.9 | 71 km | 77 km |
| Mar 2, 2005 | 10 km SSE of Santa Rosa de Sacco, Peru | M4.9 | 147 km | 122 km |
| Oct 9, 1991 | 33 km WNW of Chancay, Peru | M4.9 | 106 km | 50 km |
| Mar 19, 2012 | 33 km W of Végueta, Peru | M4.8 | 123 km | 60 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 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 | 59 km |
| 1746 | CENTRAL PERU | Earthquake | 24.0 m | 5,941 | 146 km |
| 1865 | CENTRAL PERU | Earthquake | 2.0 m | 5 | 144 km |
| 1878 | CENTRAL PERU | Unknown | — | 5 | 143 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 4.4 in | Coldest |
| February | 45°F (7°C) | 5.2 in | Warmest |
| March | 45°F (7°C) | 5.7 in | Wettest |
| April | 44°F (7°C) | 2.4 in | |
| May | 43°F (6°C) | 0.6 in | |
| June | 41°F (5°C) | 0.1 in | Driest |
| July | 41°F (5°C) | 0.1 in | |
| August | 41°F (5°C) | 0.3 in | |
| September | 42°F (6°C) | 0.8 in | |
| October | 43°F (6°C) | 2.0 in | |
| November | 44°F (7°C) | 2.0 in | |
| December | 44°F (7°C) | 3.0 in |
Mallay has a seasonal temperature swing of 5°F / from 40°F in January to 45°F in February. Total annual precipitation is 26.5 inches, with March being the wettest month (5.7") and June the driest (0.1").