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Weather & Climate in Primero de Mayo, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Primero de Mayo has a warm climate with an average annual temperature of 71°F (22°C). Winters average 54°F in January while summers reach 85°F in July. The area gets 310 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 14.3 inches (drier than the 38-inch national average). The city sits at an elevation of 1,276 feet.
Temperature
54°F Jan (12°C)
85°F Jul (29°C)
| Annual Average | 71.2°F |
| 32% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 85°F (29°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 1,276 ft (389 m) |
| Area | 4,908.4 sq mi (12,712.7 km²) |
| Population Density | 0/sq mi |
| Coordinates | 27.2367°N, 101.2237°W |
| Timezone | America/Monterrey |
Precipitation & Snow
Air Quality
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Oct 1, 1992 | 57 km N of Ocampo, Mexico | M3.8 | 131 km | 5 km |
| Feb 28, 1993 | 73 km NNE of Parras de la Fuente, Mexico | M3.8 | 148 km | 5 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 |
| 1980 | Allen | Category 1 | 81 mph | 183 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 0.6 in | Coldest |
| February | 59°F (15°C) | 0.6 in | |
| March | 67°F (19°C) | 0.3 in | Driest |
| April | 74°F (23°C) | 0.8 in | |
| May | 80°F (27°C) | 1.6 in | |
| June | 84°F (29°C) | 2.2 in | |
| July | 85°F (29°C) | 1.5 in | Warmest |
| August | 84°F (29°C) | 1.8 in | |
| September | 79°F (26°C) | 2.6 in | Wettest |
| October | 72°F (22°C) | 1.3 in | |
| November | 63°F (17°C) | 0.6 in | |
| December | 56°F (13°C) | 0.6 in |
Primero de Mayo has a seasonal temperature swing of 30°F / from 54°F in January to 85°F in July. Total annual precipitation is 14.3 inches, with September being the wettest month (2.6") and March the driest (0.3").