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San Antonio Heights, CA
Full City Profile · California · Orange County County
3.5
/5.0
B+
Good
3,479
Population
1,420/sq mi density
$144,509
Median Income
$67,234 per capita
$986,500
Home Value
$815,217 Zillow
$1,696
Median Rent
41.5% income on rent
67°F
Avg Temperature
330 sunny days/yr
224
Violent Crime/100K
2,857 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$144,509 median income, 1.5% unemployment
C+
Affordability
2.8 / 5.0
$986,500 home value, $1,696/mo rent
F
Safety
1.0 / 5.0
224 violent crimes/100K
A+
Education
5.0 / 5.0
52.4% bachelor's degree or higher
San Antonio Heights enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 56°F in January while summers reach 79°F in July. The area gets 330 sunny days per year. Annual precipitation totals 11.6 inches. Air quality is rated Good with a median AQI of 48.
Temperature
56°F Jan (13°C)
79°F Jul (26°C)
| Annual Average | 66.8°F |
| 24% above US avg | |
| January Average | 56°F (13°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 2,158 ft (658 m) |
| Area | 2.5 sq mi (6.3 km²) |
| Population Density | 1,420/sq mi |
| Coordinates | 34.1564°N, 117.6587°W |
| Timezone | America/Los_Angeles |
| County | Orange County County |
| Nearest Airport | Ontario International (ONT) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0440 ppm |
| NO₂ (Nitrogen Dioxide) | 18.4 ppb |
| CO (Carbon Monoxide) | 0.35 ppm |
| PM2.5 (Fine Particles) | 9.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.8 / 100 |
| Social Vulnerability | 24.9 / 100 |
| Community Resilience | 16.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | No Rating |
| Earthquake | Very High |
| Wildfire | Relatively High |
| Flood | Very High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | No Rating |
| Landslide | Relatively High |
| Coastal Flood | Relatively High |
| Tsunami | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 3.1 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1930 | S. CALIFORNIA | Eruption + Earthquake | 3.1 m | 1 | 92 km |
| 1994 | WEST COAST, USA | Earthquake | 0.1 m | 57 | 81 km |
| 1855 | S. CALIFORNIA | Eruption + Earthquake | — | — | 41 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 56°F (13°C) | 3.0 in | |
| February | 56°F (13°C) | 3.1 in | Wettest |
| March | 57°F (14°C) | 2.7 in | |
| April | 61°F (16°C) | 1.0 in | |
| May | 65°F (19°C) | 0.3 in | |
| June | 71°F (22°C) | 0.0 in | Driest |
| July | 79°F (26°C) | 0.0 in | Warmest |
| August | 77°F (25°C) | 0.2 in | |
| September | 74°F (23°C) | 0.4 in | |
| October | 67°F (20°C) | 0.4 in | |
| November | 59°F (15°C) | 1.6 in | |
| December | 54°F (12°C) | 2.0 in | Coldest |
San Antonio Heights has a seasonal temperature swing of 26°F / from 54°F in December to 79°F in July. Total annual precipitation is 14.7 inches, with February being the wettest month (3.1") and June the driest (0.0").