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Weather & Climate in Alto San Ildefonso, Peru
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Alto San Ildefonso has a warm climate with an average annual temperature of 76°F (24°C). Winters average 76°F in January while summers reach 74°F in July / relatively mild seasonal variation. The area gets 360 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 23.7 inches (drier than the 38-inch national average). The city sits at an elevation of 108 feet.
Temperature
76°F Jan (25°C)
74°F Jul (23°C)
| Annual Average | 75.9°F |
| 41% above US avg | |
| January Average | 76°F (25°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 360 days/yr |
Geography
| Elevation | 108 ft (33 m) |
| Area | 157.3 sq mi (407.5 km²) |
| Population Density | 3/sq mi |
| Coordinates | -7.1439°N, 79.5845°W |
| Timezone | America/Lima |
Precipitation & Snow
Air Quality
Earthquake History
111 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.3.
| Feb 24, 2007 | 63 km WSW of Pimentel, Peru | M6.3 | 101 km | 23 km |
| Jul 29, 2021 | 90 km WSW of Santiago de Cao, Peru | M5.8 | 140 km | 23 km |
| Nov 13, 2000 | 79 km WSW of Santiago de Cao, Peru | M5.8 | 121 km | 33 km |
| Apr 26, 2015 | 76 km WSW of Santiago de Cao, Peru | M5.6 | 134 km | 22 km |
| Aug 7, 2005 | 84 km SW of Pacasmayo, Peru | M5.4 | 109 km | 33 km |
| Feb 26, 2007 | 83 km WSW of Pimentel, Peru | M5.3 | 113 km | 35 km |
| Apr 2, 2017 | 108 km W of Pimentel, Peru | M5.3 | 147 km | 10 km |
| Feb 25, 2020 | 86 km W of Santiago de Cao, Peru | M5.3 | 115 km | 28 km |
| Feb 3, 2024 | 83 km W of Santiago de Cao, Peru | M5.2 | 112 km | 35 km |
| Jul 20, 2020 | 92 km WSW of Santiago de Cao, Peru | M5.1 | 143 km | 32 km |
| May 15, 2014 | 16 km NNW of Paiján, Peru | M5.1 | 56 km | 64 km |
| Jun 12, 2025 | 13 km WNW of Jayanca, Peru | M5.0 | 99 km | 68 km |
| Apr 7, 1991 | 92 km WSW of Pimentel, Peru | M5.0 | 125 km | 33 km |
| Oct 16, 2016 | 28 km SW of Pimentel, Peru | M5.0 | 62 km | 41 km |
| Nov 7, 1994 | 78 km WSW of Pimentel, Peru | M5.0 | 117 km | 24 km |
| Jul 29, 2021 | 94 km WSW of Santiago de Cao, Peru | M4.9 | 143 km | 36 km |
| Jan 9, 2024 | 59 km WSW of Santiago de Cao, Peru | M4.9 | 109 km | 54 km |
| Jul 27, 2011 | 96 km WSW of Santiago de Cao, Peru | M4.9 | 144 km | 54 km |
| Jan 7, 1993 | 112 km SW of Pacasmayo, Peru | M4.9 | 130 km | 40 km |
| Oct 6, 1992 | 96 km WSW of Santiago de Cao, Peru | M4.9 | 133 km | 50 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 9.0 m (30 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1960 | N. PERU | Earthquake | 9.0 m | 66 | 129 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 76°F (25°C) | 0.1 in | |
| February | 79°F (26°C) | 0.2 in | Warmest |
| March | 79°F (26°C) | 0.4 in | Wettest |
| April | 76°F (24°C) | 0.2 in | |
| May | 72°F (22°C) | 0.0 in | |
| June | 69°F (21°C) | 0.0 in | Driest |
| July | 74°F (23°C) | 0.0 in | |
| August | 67°F (19°C) | 0.0 in | Coldest |
| September | 68°F (20°C) | 0.0 in | |
| October | 69°F (20°C) | 0.1 in | |
| November | 70°F (21°C) | 0.0 in | |
| December | 73°F (23°C) | 0.1 in |
Alto San Ildefonso has a seasonal temperature swing of 12°F / from 67°F in August to 79°F in February. Total annual precipitation is 1.2 inches, with March being the wettest month (0.4") and June the driest (0.0").