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Rialto, CA
Full City Profile · California · Orange County County
2.6
/5.0
C+
Fair
103,866
Population
4,312/sq mi density
$85,521
Median Income
$26,943 per capita
$454,400
Home Value
$584,577 Zillow
$1,641
Median Rent
33.6% income on rent
63°F
Avg Temperature
332 sunny days/yr
572
Violent Crime/100K
3,029 property/100K
C+
Overall
2.6 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$85,521 median income, 5.5% unemployment
B+
Affordability
3.7 / 5.0
$454,400 home value, $1,641/mo rent
F
Safety
1.0 / 5.0
572 violent crimes/100K (51% above avg)
C
Education
2.0 / 5.0
12.5% bachelor's degree or higher
Rialto enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 49°F in January while summers reach 82°F in July. The area gets 332 sunny days per year. Annual precipitation totals 37.7 inches. The area receives 5.8 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
49°F Jan (9°C)
82°F Jul (28°C)
| Annual Average | 62.7°F |
| 16% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 332 days/yr |
Geography
| Elevation | 1,348 ft (411 m) |
| Area | 24.1 sq mi (62.4 km²) |
| Population Density | 4,312/sq mi |
| Coordinates | 34.1174°N, 117.3892°W |
| Timezone | America/Los_Angeles |
| County | Orange County County |
| Nearest Airport | San Bernardino International (SBD) 9 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 | 116 km |
| 1994 | WEST COAST, USA | Earthquake | 0.1 m | 57 | 106 km |
| 1855 | S. CALIFORNIA | Eruption + Earthquake | — | — | 66 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Salton Buttes (193 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Salton Buttes | Lava dome(s) | -40 m (-131 ft) | 210 | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 2.7 in | Coldest |
| February | 56°F (13°C) | 2.8 in | Wettest |
| March | 57°F (14°C) | 2.5 in | |
| April | 62°F (16°C) | 0.9 in | |
| May | 66°F (19°C) | 0.3 in | |
| June | 72°F (22°C) | 0.1 in | Driest |
| July | 82°F (28°C) | 0.1 in | Warmest |
| August | 78°F (26°C) | 0.2 in | |
| September | 75°F (24°C) | 0.4 in | |
| October | 68°F (20°C) | 0.4 in | |
| November | 60°F (15°C) | 1.3 in | |
| December | 54°F (12°C) | 1.7 in |
Rialto has a seasonal temperature swing of 33°F / from 49°F in January to 82°F in July. Total annual precipitation is 13.3 inches, with February being the wettest month (2.8") and June the driest (0.1").