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Weather & Climate in Santo Tomás, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Santo Tomás experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 36°F in January while summers reach 49°F in July / relatively mild seasonal variation. The area gets 342 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 178.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 6,476 feet.
Temperature
36°F Jan (2°C)
49°F Jul (9°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 36°F (2°C) |
| July Average | 49°F (9°C) |
| Sunny Days | 342 days/yr |
Geography
| Elevation | 6,476 ft (1,974 m) |
| Area | 151.5 sq mi (392.5 km²) |
| Population Density | 12/sq mi |
| Coordinates | -6.1514°N, 78.6823°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
63 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.1.
| Apr 17, 2019 | 68 km NNE of La Peca, Peru | M5.1 | 135 km | 49 km |
| Aug 13, 2000 | 64 km NNE of Yambrasbamba, Peru | M5.1 | 149 km | 33 km |
| Jun 12, 2025 | 13 km WNW of Jayanca, Peru | M5.0 | 139 km | 68 km |
| Jul 14, 2002 | 29 km N of Las Pirias, Peru | M5.0 | 89 km | 44 km |
| Apr 6, 1991 | 13 km NE of Olleros, Peru | M5.0 | 126 km | 10 km |
| Aug 6, 2000 | 54 km N of Yambrasbamba, Peru | M4.9 | 138 km | 33 km |
| Mar 7, 2019 | 8 km NE of Miracosta, Peru | M4.9 | 65 km | 41 km |
| Jul 21, 2021 | 7 km SSE of San Ignacio, Peru | M4.9 | 109 km | 32 km |
| Apr 6, 1991 | 17 km NE of Olleros, Peru | M4.8 | 131 km | 33 km |
| Apr 28, 1990 | 15 km NW of Sallique, Peru | M4.8 | 104 km | 33 km |
| Jun 25, 2022 | 71 km ENE of San Ignacio, Peru | M4.8 | 147 km | 10 km |
| May 30, 1990 | 17 km WSW of Segunda Jerusalén - Azunguillo, Peru | M4.7 | 140 km | 33 km |
| Jan 12, 2008 | 9 km SSE of Saña, Peru | M4.7 | 135 km | 71 km |
| Apr 5, 1991 | 49 km NNW of Segunda Jerusalén - Azunguillo, Peru | M4.7 | 149 km | 33 km |
| Jan 25, 1993 | 15 km WNW of Cañaris, Peru | M4.7 | 81 km | 33 km |
| Nov 14, 2013 | 13 km ENE of Cajaruro, Peru | M4.7 | 65 km | 56 km |
| Dec 14, 1996 | 26 km WSW of Canchaque, Peru | M4.7 | 147 km | 96 km |
| Mar 16, 2008 | 1 km NE of Motupe, Peru | M4.6 | 113 km | 73 km |
| Jun 20, 1994 | 2 km NE of Celendín, Peru | M4.6 | 99 km | 125 km |
| Jun 13, 2003 | 14 km ESE of Jayanca, Peru | M4.6 | 118 km | 64 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 36°F (2°C) | 3.1 in | Coldest |
| February | 64°F (18°C) | 3.3 in | |
| March | 64°F (18°C) | 4.7 in | Wettest |
| April | 64°F (18°C) | 3.8 in | |
| May | 63°F (17°C) | 2.3 in | |
| June | 62°F (17°C) | 1.5 in | |
| July | 49°F (9°C) | 1.2 in | Driest |
| August | 62°F (17°C) | 1.3 in | |
| September | 63°F (17°C) | 2.3 in | |
| October | 63°F (17°C) | 3.5 in | |
| November | 64°F (18°C) | 3.1 in | |
| December | 64°F (18°C) | 2.4 in | Warmest |
Santo Tomás has a seasonal temperature swing of 28°F / from 36°F in January to 64°F in December. Total annual precipitation is 32.5 inches, with March being the wettest month (4.7") and July the driest (1.2").