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Weather & Climate in San Isidro, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Isidro enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 43°F in January while summers reach 82°F in July. The area gets 321 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 8.3 inches (drier than the 38-inch national average). The city sits at an elevation of 3,737 feet.
Temperature
43°F Jan (6°C)
82°F Jul (28°C)
| Annual Average | 63.0°F |
| 17% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 321 days/yr |
Geography
| Elevation | 3,737 ft (1,139 m) |
| Area | 124.0 sq mi (321.2 km²) |
| Population Density | 28/sq mi |
| Coordinates | 31.5474°N, 106.2803°W |
| Timezone | America/Ojinaga |
Precipitation & Snow
Air Quality
Earthquake History
61 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Apr 30, 2011 | 54 km SSE of Porvenir, Mexico | M4.6 | 101 km | 10 km |
| Apr 28, 2011 | 57 km SSE of Porvenir, Mexico | M4.4 | 105 km | 7 km |
| May 2, 2011 | 58 km SSE of Porvenir, Mexico | M4.2 | 105 km | 10 km |
| May 17, 2011 | 56 km SSE of Porvenir, Mexico | M4.2 | 103 km | 10 km |
| May 2, 2011 | 57 km SSW of Sierra Blanca, Texas | M4.2 | 108 km | 5 km |
| May 7, 2011 | 68 km SSE of Porvenir, Mexico | M4.1 | 114 km | 10 km |
| Apr 28, 2011 | 56 km S of Porvenir, Mexico | M4.0 | 102 km | 10 km |
| May 14, 2011 | 48 km SSE of Porvenir, Mexico | M3.9 | 96 km | 10 km |
| Feb 8, 2015 | 36 km E of Pecan Park, New Mexico | M3.9 | 122 km | 4 km |
| May 9, 2011 | 55 km SW of Sierra Blanca, Texas | M3.9 | 104 km | 10 km |
| May 3, 2011 | 65 km SSE of Porvenir, Mexico | M3.8 | 111 km | 10 km |
| May 27, 2010 | 22 km WSW of Sierra Blanca, Texas | M3.7 | 82 km | 5 km |
| May 4, 2011 | 59 km S of Porvenir, Mexico | M3.7 | 104 km | 10 km |
| May 27, 2011 | 50 km SSE of Porvenir, Mexico | M3.6 | 97 km | 10 km |
| Apr 28, 2011 | 62 km S of Porvenir, Mexico | M3.6 | 108 km | 9 km |
| May 5, 2011 | 51 km SSE of Porvenir, Mexico | M3.6 | 98 km | 10 km |
| May 19, 2011 | 52 km SSE of Porvenir, Mexico | M3.4 | 100 km | 10 km |
| Feb 23, 1992 | 60 km SSW of Sierra Blanca, Texas | M3.4 | 124 km | 5 km |
| May 10, 2011 | 59 km SSE of Porvenir, Mexico | M3.4 | 107 km | 10 km |
| Mar 29, 2024 | 51 km E of Ascención, Mexico | M3.4 | 123 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: ESCONDIDO (25,700 acres, 1993).
| Year | Name | Acres Burned | Distance |
| 1993 | ESCONDIDO | 25,700 | 76 km |
| 2009 | OROGRANDE | 14,853 | 85 km |
| 1994 | HAT | 14,842 | 62 km |
| 1994 | UNNAMED | 14,645 | 90 km |
| 2011 | ABRAMS | 12,786 | 90 km |
| 2010 | LONG CANYON | 6,656 | 83 km |
| 1990 | UNNAMED | 6,605 | 79 km |
| 1993 | UNNAMED | 6,482 | 46 km |
| 1993 | MARTIN | 5,290 | 90 km |
| 1994 | UNNAMED | 4,579 | 73 km |
| 2022 | POTRILLO | 4,293 | 97 km |
| 1990 | SOLADA | 3,419 | 83 km |
| 1993 | UNNAMED | 3,153 | 86 km |
| 1990 | UNNAMED | 2,786 | 95 km |
| 1997 | POT | 2,255 | 97 km |
| 2009 | ALAMO | 2,178 | 66 km |
| 2008 | DRIPPING SPRINGS | 2,162 | 91 km |
| 1993 | UNNAMED | 2,144 | 86 km |
| 2010 | FT BLISS 2 | 2,070 | 80 km |
| 2023 | LOMA DESERT | 2,028 | 47 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 0.4 in | Coldest |
| February | 48°F (9°C) | 0.4 in | |
| March | 55°F (13°C) | 0.2 in | |
| April | 62°F (17°C) | 0.1 in | Driest |
| May | 71°F (21°C) | 0.3 in | |
| June | 79°F (26°C) | 0.7 in | |
| July | 82°F (28°C) | 1.8 in | Warmest, Wettest |
| August | 80°F (27°C) | 1.5 in | |
| September | 75°F (24°C) | 1.4 in | |
| October | 65°F (18°C) | 0.7 in | |
| November | 53°F (11°C) | 0.4 in | |
| December | 45°F (7°C) | 0.6 in |
San Isidro has a seasonal temperature swing of 40°F / from 43°F in January to 82°F in July. Total annual precipitation is 8.3 inches, with July being the wettest month (1.8") and April the driest (0.1").