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Gilroy, CA
Full City Profile · California · Santa Clara County County
2.9
/5.0
C+
Fair
58,561
Population
3,541/sq mi density
$131,554
Median Income
$46,830 per capita
$975,800
Home Value
$1,067,253 Zillow
$2,270
Median Rent
30.9% income on rent
60°F
Avg Temperature
330 sunny days/yr
418
Violent Crime/100K
2,461 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$131,554 median income, 4.1% unemployment
C
Affordability
2.5 / 5.0
$975,800 home value, $2,270/mo rent
F
Safety
1.0 / 5.0
418 violent crimes/100K (10% above avg)
B
Education
3.3 / 5.0
28.6% bachelor's degree or higher
Gilroy enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 49°F in January while summers reach 71°F in July. The area gets 330 sunny days per year. Annual precipitation totals 19.8 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
49°F Jan (10°C)
71°F Jul (21°C)
| Annual Average | 60.2°F |
| 11% above US avg | |
| January Average | 49°F (10°C) |
| July Average | 71°F (21°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 213 ft (65 m) |
| Area | 16.2 sq mi (41.8 km²) |
| Population Density | 3,541/sq mi |
| Coordinates | 37.0064°N, 121.5853°W |
| Timezone | America/Los_Angeles |
| County | Santa Clara County County |
| Nearest Airport | Norman Y Mineta San Jose International (SJC) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0372 ppm |
| NO₂ (Nitrogen Dioxide) | 15.5 ppb |
| SO₂ (Sulfur Dioxide) | 0.16 ppb |
| CO (Carbon Monoxide) | 0.39 ppm |
| PM2.5 (Fine Particles) | 6.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.8 / 100 |
| Social Vulnerability | 17.2 / 100 |
| Community Resilience | 72.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very High |
| Wildfire | Relatively Moderate |
| Flood | Very High |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively High |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Drought | Relatively High |
| Cold Wave | No Rating |
| Landslide | Relatively High |
| Coastal Flood | Relatively High |
| Tsunami | Very Low |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 4.5 m (15 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1868 | N. CALIFORNIA | Eruption + Earthquake | 4.5 m | 30 | 90 km |
| 1989 | N. CALIFORNIA | Earthquake | 1.0 m | 62 | 27 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | — | 84 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | — | 112 km |
| 1901 | MONTEREY BAY, N. CALIFORNIA | Eruption + Earthquake | — | — | 148 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | — | — | 35 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (10°C) | 4.3 in | Wettest |
| February | 51°F (11°C) | 3.4 in | |
| March | 53°F (12°C) | 3.3 in | |
| April | 57°F (14°C) | 1.6 in | |
| May | 61°F (16°C) | 0.3 in | |
| June | 66°F (19°C) | 0.1 in | |
| July | 71°F (21°C) | 0.1 in | Driest |
| August | 71°F (22°C) | 0.1 in | Warmest |
| September | 69°F (20°C) | 0.3 in | |
| October | 64°F (18°C) | 1.0 in | |
| November | 55°F (13°C) | 3.1 in | |
| December | 48°F (9°C) | 3.3 in | Coldest |
Gilroy has a seasonal temperature swing of 23°F / from 48°F in December to 71°F in August. Total annual precipitation is 20.7 inches, with January being the wettest month (4.3") and July the driest (0.1").