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Weather & Climate in San Miguel, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Miguel enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 42°F in January while summers reach 70°F in July. The area gets 330 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 19.9 inches (drier than the 38-inch national average). The area receives 8.0 inches of snow annually. Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 2,470 feet.
Temperature
42°F Jan (6°C)
70°F Jul (21°C)
| Annual Average | 55.7°F |
| 3% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 2,470 ft (753 m) |
| Area | 5.7 sq mi (14.6 km²) |
| Population Density | 53/sq mi |
| Coordinates | 31.6295°N, 111.7801°W |
| Timezone | America/Phoenix |
| County | Pima County County |
| Nearest Airport | Nogales International (OLS) 57 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 99.1 / 100 |
| Social Vulnerability | 50.9 / 100 |
| Community Resilience | 20.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively High |
| Flood | Very High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very High |
| Winter Weather | Relatively Moderate |
| Lightning | Very High |
| Drought | Relatively Moderate |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
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 | 138 km | 5 km |
| Aug 16, 1993 | 261km SE of Fortuna Foothills, Arizona | M3.4 | 144 km | 6 km |
| Sep 28, 2023 | 21 km E of Tanque Verde, Arizona | M3.1 | 137 km | 12 km |
| Mar 31, 1996 | 147km ESE of Fortuna Foothills, Arizona | M3.0 | 127 km | 6 km |
| Aug 9, 2025 | 14 km ENE of Willow Canyon, Arizona | M2.6 | 146 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
14 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 fatalities, 50 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 27, 1964 | EF2 | 96 km | 0.1 mi | 2 |
| Jul 16, 1984 | EF1 | 76 km | 0.1 mi | 0 |
| Dec 23, 1975 | EF1 | 58 km | 2.0 mi | 0 |
| Jun 23, 1974 | EF1 | 89 km | 1.0 mi | 1 |
| Aug 16, 1969 | EF1 | 84 km | 1.0 mi | 0 |
| Jul 27, 1961 | EF1 | 98 km | 0.1 mi | 0 |
| Aug 13, 2023 | EF0 | 87 km | 0.1 mi | 0 |
| Aug 10, 2019 | EF0 | 69 km | 0.2 mi | 0 |
| May 9, 2012 | EF0 | 83 km | 0.3 mi | 0 |
| Apr 4, 2004 | EF0 | 52 km | 0.1 mi | 0 |
| Jun 23, 1974 | EF0 | 93 km | 2.0 mi | 0 |
| Jun 17, 1974 | EF0 | 41 km | 0.5 mi | 0 |
| Aug 1, 1969 | EF0 | 97 km | 0.1 mi | 0 |
| Mar 4, 1954 | EF0 | 86 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Pinacate (163 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pinacate | Pyroclastic cone(s) | 1,200 m (3,937 ft) | Unknown | 163 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MURPHY COMPLEX (64,407 acres, 2011).
| Year | Name | Acres Burned | Distance |
| 2011 | MURPHY COMPLEX | 64,407 | 65 km |
| 2022 | CONTRERAS | 31,297 | 35 km |
| 2009 | ELK HORN | 22,745 | 26 km |
| 2002 | WALKER | 17,438 | 75 km |
| 2022 | TONTO CANYON | 16,989 | 67 km |
| 2005 | FLORIDA | 16,362 | 90 km |
| 2011 | BULL | 16,339 | 75 km |
| 2016 | BROWN | 15,681 | 25 km |
| 2020 | ENCINOS | 14,145 | 15 km |
| 2023 | BEEHIVE | 11,087 | 62 km |
| 2013 | SOLDIER BASIN | 11,052 | 99 km |
| 2016 | LA SIERRA | 11,035 | 70 km |
| 1986 | SASABE | 10,734 | 28 km |
| 2021 | ALAMO | 10,478 | 69 km |
| 2016 | MULE RIDGE | 8,619 | 59 km |
| 2008 | WHITE TANK | 8,479 | 61 km |
| 1985 | UNNAMED | 8,047 | 13 km |
| 2007 | ALAMBRE | 7,221 | 35 km |
| 2009 | SAN JUAN | 6,710 | 40 km |
| 2006 | CITY HALL | 6,639 | 35 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 0.9 in | Coldest |
| February | 54°F (12°C) | 0.8 in | |
| March | 58°F (14°C) | 0.8 in | |
| April | 64°F (18°C) | 0.3 in | |
| May | 71°F (22°C) | 0.2 in | Driest |
| June | 81°F (27°C) | 0.3 in | |
| July | 70°F (21°C) | 2.8 in | Wettest |
| August | 83°F (28°C) | 2.8 in | Warmest |
| September | 79°F (26°C) | 1.5 in | |
| October | 69°F (20°C) | 1.1 in | |
| November | 58°F (14°C) | 0.7 in | |
| December | 50°F (10°C) | 1.4 in |
San Miguel has a seasonal temperature swing of 41°F / from 42°F in January to 83°F in August. Total annual precipitation is 13.6 inches, with July being the wettest month (2.8") and May the driest (0.2").