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Harmony Grove, CA
Full City Profile · California · Orange County County
3.7
/5.0
B+
Good
2,044
Population
664/sq mi density
$217,917
Median Income
$85,871 per capita
$1,039,900
Home Value
$943,389 Zillow
$3,501
Median Rent
51.0% income on rent
66°F
Avg Temperature
330 sunny days/yr
216
Violent Crime/100K
1,416 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$217,917 median income, 0.0% unemployment
B+
Affordability
4.0 / 5.0
$1,039,900 home value, $3,501/mo rent
F
Safety
1.0 / 5.0
216 violent crimes/100K
A+
Education
5.0 / 5.0
71.3% bachelor's degree or higher
Harmony Grove enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 57°F in January while summers reach 76°F in July. The area gets 330 sunny days per year. Annual precipitation totals 14.5 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
57°F Jan (14°C)
76°F Jul (24°C)
| Annual Average | 65.8°F |
| 22% above US avg | |
| January Average | 57°F (14°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 717 ft (219 m) |
| Area | 3.1 sq mi (8.0 km²) |
| Population Density | 664/sq mi |
| Coordinates | 33.1007°N, 117.1380°W |
| Timezone | America/Los_Angeles |
| County | Orange County County |
| Nearest Airport | San Diego International (SAN) 26 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
2 tsunamis 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 | — | 45 km |
| 1855 | S. CALIFORNIA | Eruption + Earthquake | — | — | 142 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Salton Buttes (142 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Salton Buttes | Lava dome(s) | -40 m (-131 ft) | 210 | 142 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 57°F (14°C) | 2.8 in | Wettest |
| February | 56°F (13°C) | 2.6 in | |
| March | 57°F (14°C) | 2.5 in | |
| April | 61°F (16°C) | 1.1 in | |
| May | 64°F (18°C) | 0.4 in | |
| June | 69°F (20°C) | 0.1 in | |
| July | 76°F (24°C) | 0.0 in | Warmest, Driest |
| August | 75°F (24°C) | 0.2 in | |
| September | 73°F (23°C) | 0.4 in | |
| October | 67°F (20°C) | 0.4 in | |
| November | 60°F (16°C) | 1.7 in | |
| December | 55°F (13°C) | 2.0 in | Coldest |
Harmony Grove has a seasonal temperature swing of 21°F / from 55°F in December to 76°F in July. Total annual precipitation is 14.0 inches, with January being the wettest month (2.8") and July the driest (0.0").