Bostonia, CA
Full City Profile · California · San Diego County County
3.0
/5.0
B
Good
16,545
Population
8,573/sq mi density
$73,549
Median Income
$32,959 per capita
$435,900
Home Value
$810,633 Zillow
$1,932
Median Rent
42.1% income on rent
65°F
Avg Temperature
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.0 / 5.0
$73,549 median income, 8.9% unemployment
B
Affordability
3.3 / 5.0
$435,900 home value, $1,932/mo rent
C+
Education
2.8 / 5.0
22.6% bachelor's degree or higher
Bostonia enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 56°F in January while summers reach 75°F in July. Annual precipitation totals 11.6 inches. The area receives 0.0 inches of snow annually. Air quality is rated Moderate with a median AQI of 71.
Temperature
56°F Jan (13°C)
75°F Jul (24°C)
| Annual Average | 65.1°F |
| 21% above US avg | |
| January Average | 56°F (13°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 672 ft (205 m) |
| Area | 1.9 sq mi (5.0 km²) |
| Population Density | 8,573/sq mi |
| Coordinates | 32.8190°N, 116.9423°W |
| Timezone | America/Los_Angeles |
| County | San Diego County County |
| Nearest Airport | San Diego International (SAN) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 71.0 |
| Rating | Moderate |
| Good Days % | 12.8% |
| Unhealthy Days | 52 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0453 ppm |
| NO₂ (Nitrogen Dioxide) | 13.7 ppb |
| SO₂ (Sulfur Dioxide) | 0.07 ppb |
| CO (Carbon Monoxide) | 0.50 ppm |
| PM2.5 (Fine Particles) | 8.4 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.7 / 100 |
| Social Vulnerability | 24.8 / 100 |
| Community Resilience | 8.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively High |
| Wildfire | Very High |
| Flood | Very High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 1.2 m (4 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1862 | S. CALIFORNIA | Eruption + Earthquake | 1.2 m | - | 28 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Salton Buttes (131 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Salton Buttes | Lava dome(s) | -40 m (-131 ft) | 210 | 131 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 56°F (13°C) | 2.3 in | |
| February | 57°F (14°C) | 2.6 in | Wettest |
| March | 60°F (15°C) | 1.9 in | |
| April | 63°F (17°C) | 0.8 in | |
| May | 66°F (19°C) | 0.3 in | |
| June | 70°F (21°C) | 0.1 in | |
| July | 75°F (24°C) | 0.2 in | |
| August | 77°F (25°C) | 0.0 in | Warmest, Driest |
| September | 75°F (24°C) | 0.1 in | |
| October | 68°F (20°C) | 0.5 in | |
| November | 61°F (16°C) | 1.0 in | |
| December | 55°F (13°C) | 1.8 in | Coldest |
Bostonia has a seasonal temperature swing of 22°F / from 55°F in December to 77°F in August. Total annual precipitation is 11.6 inches, with February being the wettest month (2.6") and August the driest (0.0").