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Weather & Climate in Dieciocho de Marzo, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dieciocho de Marzo enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 54°F in January while summers reach 65°F in July / relatively mild seasonal variation. The area gets 296 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 21.9 inches (drier than the 38-inch national average). The city sits at an elevation of 6,283 feet.
Temperature
54°F Jan (12°C)
65°F Jul (19°C)
| Annual Average | 61.9°F |
| 15% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 296 days/yr |
Geography
| Elevation | 6,283 ft (1,915 m) |
| Area | 296.6 sq mi (768.2 km²) |
| Population Density | 4/sq mi |
| Coordinates | 21.4824°N, 101.7988°W |
| Timezone | America/Mexico_City |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jun 27, 2006 | 4 km ENE of Cuerámaro, Mexico | M3.9 | 94 km | 67 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2015 | Patricia | Category 1 | — | 291 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Michoacan-Guanajuato (182 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Michoacan-Guanajuato | Pyroclastic cone(s) | 3,860 m (12,664 ft) | 1952 | 182 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 0.6 in | Coldest |
| February | 57°F (14°C) | 0.4 in | |
| March | 61°F (16°C) | 0.2 in | Driest |
| April | 65°F (18°C) | 0.4 in | |
| May | 68°F (20°C) | 1.1 in | Warmest |
| June | 68°F (20°C) | 3.7 in | |
| July | 65°F (19°C) | 5.1 in | Wettest |
| August | 65°F (18°C) | 4.5 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 62°F (16°C) | 1.6 in | |
| November | 58°F (14°C) | 0.4 in | |
| December | 55°F (13°C) | 0.4 in |
Dieciocho de Marzo has a seasonal temperature swing of 14°F / from 54°F in January to 68°F in May. Total annual precipitation is 21.8 inches, with July being the wettest month (5.1") and March the driest (0.2").