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Weather & Climate in Santo Tomas, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Santo Tomas has a cool climate with an average annual temperature of 41°F (5°C). Winters average 41°F in January while summers reach 40°F in July / relatively mild seasonal variation. The area gets 356 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 65.1 inches (wetter than the 38-inch national average). The area receives 56.4 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 12,005 feet.
Temperature
41°F Jan (5°C)
40°F Jul (5°C)
| Annual Average | 41.4°F |
| 23% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 40°F (5°C) |
| Sunny Days | 356 days/yr |
Geography
| Elevation | 12,005 ft (3,659 m) |
| Area | 995.2 sq mi (2,577.5 km²) |
| Population Density | 4/sq mi |
| Coordinates | -14.4456°N, 72.0842°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
452 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Jul 6, 1991 | 15 km W of Lares, Peru | M7.0 | 149 km | 105 km |
| Jul 17, 2013 | 3 km ESE of Maca, Peru | M6.0 | 140 km | 7 km |
| Sep 13, 2010 | 21 km SW of Nuñoa, Peru | M5.9 | 142 km | 180 km |
| Nov 27, 1999 | 10 km S of Langui, Peru | M5.9 | 86 km | 126 km |
| Jul 26, 2005 | 9 km SSW of Toro, Peru | M5.9 | 138 km | 111 km |
| Aug 9, 2001 | 7 km WSW of Turpay, Peru | M5.8 | 68 km | 33 km |
| Dec 4, 2001 | 20 km WSW of Orcopampa, Peru | M5.8 | 111 km | 33 km |
| Apr 12, 1998 | 9 km N of Madrigal, Peru | M5.8 | 123 km | 33 km |
| May 21, 2013 | 17 km S of Chinchaypujio, Peru | M5.8 | 76 km | 92 km |
| Nov 11, 1994 | 16 km NW of Uñon, Peru | M5.8 | 140 km | 121 km |
| May 24, 2003 | 10 km W of Pichigua, Peru | M5.6 | 66 km | 144 km |
| Sep 12, 1998 | 0 km SE of Turpay, Peru | M5.6 | 62 km | 91 km |
| Dec 8, 2001 | 3 km NE of Alca, Peru | M5.6 | 103 km | 26 km |
| Jan 29, 2019 | 20 km NNW of Ayo, Peru | M5.5 | 124 km | 112 km |
| Aug 15, 2016 | 11 km SW of Tapay, Peru | M5.5 | 135 km | 20 km |
| Mar 16, 2022 | 10 km SW of Madrigal, Peru | M5.5 | 138 km | 12 km |
| Jan 29, 1998 | 4 km SE of Choco, Peru | M5.4 | 129 km | 134 km |
| Apr 21, 2012 | 5 km ESE of Coporaque, Peru | M5.4 | 77 km | 111 km |
| May 16, 2017 | 25 km WSW of Cotaruse, Peru | M5.4 | 143 km | 10 km |
| Dec 26, 1994 | 6 km NE of Madrigal, Peru | M5.4 | 130 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Quimsachata (85 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Quimsachata | Lava dome | 3,693 m (12,116 ft) | -4450 | 85 km |
| Andahua-Orcopampa | Pyroclastic cone(s) | 4,713 m (15,463 ft) | 1490 | 112 km |
| Sabancaya | Stratovolcano(es) | 5,960 m (19,554 ft) | 2020 | 151 km |
| Huambo | Volcanic field | 4,550 m (14,928 ft) | -700 | 154 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 7.8 in | Wettest |
| February | 48°F (9°C) | 7.4 in | |
| March | 48°F (9°C) | 6.7 in | |
| April | 47°F (9°C) | 2.4 in | |
| May | 45°F (7°C) | 0.6 in | |
| June | 42°F (6°C) | 0.2 in | |
| July | 40°F (5°C) | 0.2 in | Coldest, Driest |
| August | 43°F (6°C) | 0.4 in | |
| September | 46°F (8°C) | 1.1 in | |
| October | 48°F (9°C) | 1.7 in | |
| November | 49°F (9°C) | 2.8 in | |
| December | 49°F (10°C) | 5.0 in | Warmest |
Santo Tomas has a seasonal temperature swing of 9°F / from 40°F in July to 49°F in December. Total annual precipitation is 36.2 inches, with January being the wettest month (7.8") and July the driest (0.2").