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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 75°F (24°C). Winters average 61°F in January while summers reach 89°F in July. The area gets 313 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 12.8 inches (drier than the 38-inch national average). The city sits at an elevation of 49 feet.
Temperature
61°F Jan (16°C)
89°F Jul (31°C)
| Annual Average | 75.0°F |
| 39% above US avg | |
| January Average | 61°F (16°C) |
| July Average | 89°F (31°C) |
| Sunny Days | 313 days/yr |
Geography
| Elevation | 49 ft (15 m) |
| Area | 949.4 sq mi (2,459.0 km²) |
| Population Density | 2/sq mi |
| Coordinates | 27.3886°N, 110.1222°W |
| Timezone | America/Hermosillo |
Precipitation & Snow
Air Quality
Earthquake History
126 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.6.
| Aug 28, 1995 | 95 km SW of Etchoropo, Mexico | M6.6 | 145 km | 12 km |
| Oct 19, 2013 | 98 km SW of Etchoropo, Mexico | M6.6 | 146 km | 9 km |
| Mar 12, 2003 | 87 km SW of Paredón Colorado, Mexico | M6.4 | 103 km | 10 km |
| Jan 19, 2018 | 79 km NNE of Loreto, Mexico | M6.3 | 123 km | 10 km |
| Mar 13, 2007 | 85 km ENE of Loreto, Mexico | M6.0 | 132 km | 26 km |
| Feb 25, 2007 | 94 km E of Loreto, Mexico | M5.9 | 141 km | 10 km |
| Jul 30, 2006 | 76 km E of Mulegé, Mexico | M5.9 | 122 km | 10 km |
| Mar 24, 2000 | 51 km SSW of San Carlos, Mexico | M5.6 | 118 km | 10 km |
| Jul 31, 2021 | 60 km SW of San Carlos, Mexico | M5.5 | 138 km | 10 km |
| Oct 1, 1996 | 70 km NE of Loreto, Mexico | M5.5 | 125 km | 10 km |
| Jul 3, 2024 | 77 km NNE of Loreto, Mexico | M5.3 | 124 km | 10 km |
| Jan 21, 2022 | 76 km SSW of Bahía de Lobos, Mexico | M5.3 | 101 km | 10 km |
| Apr 26, 2011 | 73 km SW of San Carlos, Mexico | M5.3 | 140 km | 11 km |
| Jan 18, 2001 | 99 km SW of Etchoropo, Mexico | M5.3 | 147 km | 10 km |
| May 28, 2006 | 88 km NNE of Loreto, Mexico | M5.2 | 117 km | 10 km |
| Sep 3, 1996 | 84 km ENE of Loreto, Mexico | M5.2 | 139 km | 10 km |
| Apr 18, 2024 | 84 km ENE of Loreto, Mexico | M5.2 | 131 km | 10 km |
| Oct 3, 1992 | 58 km SSW of San Carlos, Mexico | M5.2 | 123 km | 10 km |
| May 25, 1992 | 88 km ENE of Loreto, Mexico | M5.2 | 136 km | 10 km |
| May 28, 2006 | 76 km N of Loreto, Mexico | M5.1 | 134 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
12 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2016 | Newton | Category 1 | 81 mph | 208 km |
| 2014 | Odile | Category 1 | 92 mph | 224 km |
| 2009 | Jimena | Category 2 | 104 mph | 238 km |
| 2008 | Norbert | Category 2 | 92 mph | 120 km |
| 2007 | Henriette | Category 1 | 75 mph | 105 km |
| 2003 | Marty | Category 1 | 81 mph | 176 km |
| 1998 | Isis | Category 1 | 75 mph | 278 km |
| 1996 | Fausto | Category 1 | 75 mph | 195 km |
| 1995 | Ismael | Category 1 | 81 mph | 223 km |
| 1986 | Newton | Category 1 | 86 mph | 83 km |
| 1986 | Paine | Category 1 | 92 mph | 296 km |
| 1982 | Paul | Category 2 | 98 mph | 218 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 61°F (16°C) | 0.8 in | Coldest |
| February | 63°F (17°C) | 0.5 in | |
| March | 66°F (19°C) | 0.2 in | |
| April | 71°F (22°C) | 0.1 in | |
| May | 77°F (25°C) | 0.0 in | Driest |
| June | 85°F (30°C) | 0.2 in | |
| July | 89°F (31°C) | 2.6 in | Warmest |
| August | 88°F (31°C) | 3.0 in | Wettest |
| September | 87°F (30°C) | 3.0 in | |
| October | 80°F (27°C) | 1.1 in | |
| November | 70°F (21°C) | 0.5 in | |
| December | 63°F (17°C) | 0.7 in |
Primero de Mayo has a seasonal temperature swing of 27°F / from 61°F in January to 89°F in July. Total annual precipitation is 12.8 inches, with August being the wettest month (3.0") and May the driest (0.0").