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Weather & Climate in Tomas, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Tomas has a cool climate with an average annual temperature of 40°F (4°C). Winters average 39°F in January while summers reach 39°F in July / relatively mild seasonal variation. The area gets 362 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 67.4 inches (wetter than the 38-inch national average). The area receives 51.7 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 12,694 feet.
Temperature
39°F Jan (4°C)
39°F Jul (4°C)
| Annual Average | 39.9°F |
| 26% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 39°F (4°C) |
| Sunny Days | 362 days/yr |
Geography
| Elevation | 12,694 ft (3,869 m) |
| Area | 11.5 sq mi (29.9 km²) |
| Population Density | 31/sq mi |
| Coordinates | -12.2386°N, 75.7453°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
195 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 | 107 km | 106 km |
| Jun 23, 2021 | 11 km WSW of Mala, Peru | M5.9 | 118 km | 50 km |
| Sep 22, 2010 | 6 km ENE of Chincha Alta, Peru | M5.7 | 133 km | 50 km |
| Jan 7, 2022 | 6 km NW of Cocachacra, Peru | M5.6 | 99 km | 96 km |
| Jan 23, 1990 | 4 km WSW of Cuenca, Peru | M5.6 | 77 km | 104 km |
| Oct 1, 1996 | 19 km SSW of Chilca, Peru | M5.6 | 126 km | 62 km |
| Aug 16, 2007 | 22 km SSW of San Vicente de Cañete, Peru | M5.6 | 139 km | 40 km |
| Nov 25, 2013 | 12 km SE of Omas, Peru | M5.5 | 64 km | 77 km |
| May 12, 2022 | 9 km W of San Bartolo, Peru | M5.4 | 123 km | 53 km |
| Nov 6, 1992 | 18 km NNW of Mucllo, Peru | M5.3 | 109 km | 14 km |
| Mar 18, 1999 | 21 km NNE of Huancaya, Peru | M5.3 | 23 km | 116 km |
| Aug 1, 2009 | 8 km SSW of Chambara, Peru | M5.2 | 40 km | 101 km |
| Jun 3, 2014 | 20 km W of Chilca, Peru | M5.2 | 132 km | 36 km |
| May 13, 2019 | 11 km WNW of Salcabamba, Peru | M5.2 | 94 km | 90 km |
| May 17, 2018 | 7 km E of Mala, Peru | M5.2 | 101 km | 56 km |
| Apr 25, 2000 | 8 km NE of Pilpichaca, Peru | M5.1 | 143 km | 108 km |
| Apr 7, 2022 | 13 km ESE of Cocas, Peru | M5.1 | 132 km | 87 km |
| Jan 10, 1992 | 31 km SSW of San Vicente de Cañete, Peru | M5.0 | 146 km | 52 km |
| May 3, 1992 | 11 km NNW of Colonia, Peru | M5.0 | 37 km | 100 km |
| Apr 10, 2022 | 6 km WSW of Comas, Peru | M5.0 | 86 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
5 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 | 150 km |
| 1865 | CENTRAL PERU | Earthquake | 2.0 m | 5 | 150 km |
| 1806 | CENTRAL PERU | Earthquake | 1.0 m | — | 148 km |
| 1878 | CENTRAL PERU | Unknown | — | 5 | 139 km |
| 1860 | CENTRAL PERU | Earthquake | — | — | 148 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 5.1 in | Coldest |
| February | 44°F (7°C) | 5.8 in | Warmest, Wettest |
| March | 44°F (7°C) | 5.6 in | |
| April | 44°F (6°C) | 2.2 in | |
| May | 42°F (6°C) | 0.5 in | |
| June | 41°F (5°C) | 0.2 in | Driest |
| July | 39°F (4°C) | 0.2 in | |
| August | 41°F (5°C) | 0.4 in | |
| September | 42°F (6°C) | 1.2 in | |
| October | 43°F (6°C) | 2.2 in | |
| November | 44°F (7°C) | 2.4 in | |
| December | 44°F (7°C) | 4.1 in |
Tomas has a seasonal temperature swing of 5°F / from 39°F in January to 44°F in February. Total annual precipitation is 29.9 inches, with February being the wettest month (5.8") and June the driest (0.2").