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Rancho Cucamonga, CA
Full City Profile · California · Orange County County
3.2
/5.0
B
Good
174,693
Population
3,756/sq mi density
$109,511
Median Income
$45,626 per capita
$694,400
Home Value
$782,617 Zillow
$2,286
Median Rent
33.4% income on rent
63°F
Avg Temperature
328 sunny days/yr
279
Violent Crime/100K
1,928 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$109,511 median income, 3.9% unemployment
B
Affordability
3.1 / 5.0
$694,400 home value, $2,286/mo rent
F
Safety
1.0 / 5.0
279 violent crimes/100K
B+
Education
4.0 / 5.0
37.3% bachelor's degree or higher
Rancho Cucamonga enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 50°F in January while summers reach 82°F in July. The area gets 328 sunny days per year. Annual precipitation totals 48.5 inches. The area receives 13.6 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
50°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 63.0°F |
| 17% above US avg | |
| January Average | 50°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 328 days/yr |
Geography
| Elevation | 1,427 ft (435 m) |
| Area | 40.0 sq mi (103.6 km²) |
| Population Density | 3,756/sq mi |
| Coordinates | 34.1303°N, 117.5661°W |
| Timezone | America/Los_Angeles |
| County | Orange County County |
| Nearest Airport | Ontario International (ONT) 6 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 | 100 km |
| 1994 | WEST COAST, USA | Earthquake | 0.1 m | 57 | 90 km |
| 1855 | S. CALIFORNIA | Eruption + Earthquake | — | — | 49 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 50°F (10°C) | 3.0 in | Coldest |
| 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 | 82°F (28°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 |
Rancho Cucamonga has a seasonal temperature swing of 32°F / from 50°F in January to 82°F in July. Total annual precipitation is 14.7 inches, with February being the wettest month (3.1") and June the driest (0.0").