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Weather & Climate in Altar, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Altar has a warm climate with an average annual temperature of 71°F (22°C). Winters average 55°F in January while summers reach 89°F in July. The area gets 316 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 10.9 inches (drier than the 38-inch national average). The city sits at an elevation of 1,358 feet.
Temperature
55°F Jan (13°C)
89°F Jul (31°C)
| Annual Average | 71.0°F |
| 31% above US avg | |
| January Average | 55°F (13°C) |
| July Average | 89°F (31°C) |
| Sunny Days | 316 days/yr |
Geography
| Elevation | 1,358 ft (414 m) |
| Area | 2,070.8 sq mi (5,363.5 km²) |
| Population Density | 4/sq mi |
| Coordinates | 30.7163°N, 111.8380°W |
| Timezone | America/Hermosillo |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Oct 16, 1999 | 10 km ESE of Imuris, Mexico | M4.5 | 104 km | 5 km |
| Mar 29, 1999 | 56 km WSW of Plutarco Elías Calles (La Y Griega), Mexico | M4.2 | 137 km | 10 km |
| Feb 18, 1991 | 46 km SE of Puerto Peñasco, Mexico | M4.2 | 139 km | 10 km |
| Aug 16, 1993 | 261km SE of Fortuna Foothills, Arizona | M3.4 | 98 km | 6 km |
| Feb 17, 1992 | 222km SE of Estacion Coahuila, B.C., MX | M3.3 | 141 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Nearby Volcanoes
1 volcano within 200 km. Closest: Pinacate (197 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pinacate | Pyroclastic cone(s) | 1,200 m (3,937 ft) | Unknown | 197 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: TONTO CANYON (16,989 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | TONTO CANYON | 16,989 | 99 km |
| 2016 | LA SIERRA | 11,035 | 98 km |
| 1986 | SASABE | 10,734 | 96 km |
| 2021 | ALAMO | 10,478 | 97 km |
| 2016 | MULE RIDGE | 8,619 | 99 km |
| 2000 | GUS | 6,509 | 95 km |
| 2011 | PENA | 5,936 | 99 km |
| 2023 | AZBAR-FY23-RX-W | 5,674 | 96 km |
| 2016 | CUMERO | 5,616 | 94 km |
| 2008 | ALAMO | 4,847 | 99 km |
| 1985 | UNNAMED | 4,629 | 96 km |
| 2016 | BLACK PEAK | 4,442 | 98 km |
| 2018 | CUMERO | 4,332 | 91 km |
| 1997 | UNNAMED | 3,986 | 93 km |
| 1985 | UNNAMED | 3,498 | 93 km |
| 1990 | UNNAMED | 3,387 | 93 km |
| 1991 | CUMERO | 3,147 | 92 km |
| 2003 | MOSCA | 3,063 | 100 km |
| 1995 | UNNAMED | 2,577 | 96 km |
| 2007 | GARCIA | 2,443 | 93 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 55°F (13°C) | 0.7 in | Coldest |
| February | 58°F (14°C) | 0.7 in | |
| March | 62°F (17°C) | 0.5 in | |
| April | 68°F (20°C) | 0.2 in | |
| May | 75°F (24°C) | 0.1 in | Driest |
| June | 84°F (29°C) | 0.2 in | |
| July | 89°F (31°C) | 2.4 in | Warmest |
| August | 87°F (31°C) | 2.7 in | Wettest |
| September | 83°F (28°C) | 1.1 in | |
| October | 73°F (23°C) | 0.8 in | |
| November | 63°F (17°C) | 0.5 in | |
| December | 55°F (13°C) | 1.1 in |
Altar has a seasonal temperature swing of 34°F / from 55°F in January to 89°F in July. Total annual precipitation is 11.0 inches, with August being the wettest month (2.7") and May the driest (0.1").