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Costa Mesa, CA
Full City Profile · California · Orange County County
2.9
/5.0
C+
Fair
110,538
Population
6,992/sq mi density
$110,073
Median Income
$56,625 per capita
$1,054,700
Home Value
$1,381,297 Zillow
$2,395
Median Rent
31.2% income on rent
61°F
Avg Temperature
330 sunny days/yr
274
Violent Crime/100K
3,278 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$110,073 median income, 3.6% unemployment
F
Affordability
1.2 / 5.0
$1,054,700 home value, $2,395/mo rent
F
Safety
1.0 / 5.0
274 violent crimes/100K
A
Education
4.5 / 5.0
43.6% bachelor's degree or higher
Costa Mesa enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 54°F in January while summers reach 68°F in July. The area gets 330 sunny days per year. Annual precipitation totals 34.5 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
54°F Jan (12°C)
68°F Jul (20°C)
| Annual Average | 61.0°F |
| 13% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 72 ft (22 m) |
| Area | 15.8 sq mi (40.9 km²) |
| Population Density | 6,992/sq mi |
| Coordinates | 33.6659°N, 117.9123°W |
| Timezone | America/Los_Angeles |
| County | Orange County County |
| Nearest Airport | John Wayne/Orange County (SNA) 3 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
4 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 | 79 km |
| 1862 | S. CALIFORNIA | Eruption + Earthquake | 1.2 m | — | 126 km |
| 1994 | WEST COAST, USA | Earthquake | 0.1 m | 57 | 84 km |
| 1855 | S. CALIFORNIA | Eruption + Earthquake | — | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 2.8 in | Coldest, Wettest |
| February | 57°F (14°C) | 2.7 in | |
| March | 58°F (14°C) | 2.4 in | |
| April | 60°F (16°C) | 0.7 in | |
| May | 62°F (17°C) | 0.2 in | |
| June | 66°F (19°C) | 0.1 in | |
| July | 68°F (20°C) | 0.0 in | Driest |
| August | 70°F (21°C) | 0.1 in | Warmest |
| September | 69°F (21°C) | 0.3 in | |
| October | 66°F (19°C) | 0.3 in | |
| November | 60°F (16°C) | 1.3 in | |
| December | 56°F (13°C) | 1.8 in |
Costa Mesa has a seasonal temperature swing of 17°F / from 54°F in January to 70°F in August. Total annual precipitation is 12.6 inches, with January being the wettest month (2.8") and July the driest (0.0").