Wilton, CA
Full City Profile · California · Sacramento County County
4.2
/5.0
A
Great
6,198
Population
214/sq mi density
$171,579
Median Income
$55,949 per capita
$891,200
Home Value
$953,704 Zillow
$1,792
Median Rent
27.1% income on rent
63°F
Avg Temperature
A
Overall
4.2 / 5.0
Strong
A+
Economy
5.0 / 5.0
$171,579 median income, 1.9% unemployment
B+
Affordability
3.7 / 5.0
$891,200 home value, $1,792/mo rent
B+
Education
3.7 / 5.0
34.2% bachelor's degree or higher
Wilton enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 49°F in January while summers reach 78°F in July. Annual precipitation totals 19.2 inches. The area receives 0.0 inches of snow annually. Air quality is rated Moderate with a median AQI of 51.
Temperature
49°F Jan (9°C)
78°F Jul (26°C)
| Annual Average | 63.4°F |
| 17% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 78°F (26°C) |
Geography
| Elevation | 119 ft (36 m) |
| Area | 29.0 sq mi (75.1 km²) |
| Population Density | 214/sq mi |
| Coordinates | 38.4130°N, 121.2127°W |
| Timezone | America/Los_Angeles |
| County | Sacramento County County |
| Nearest Airport | Sacramento International (SMF) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 51.0 |
| Rating | Moderate |
| Good Days % | 49.7% |
| Unhealthy Days | 15 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0409 ppm |
| NO₂ (Nitrogen Dioxide) | 8.1 ppb |
| SO₂ (Sulfur Dioxide) | 0.17 ppb |
| CO (Carbon Monoxide) | 0.47 ppm |
| PM2.5 (Fine Particles) | 7.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.1 / 100 |
| Social Vulnerability | 37.4 / 100 |
| Community Resilience | 57.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Relatively High |
| Wildfire | Relatively Moderate |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | No Rating |
| Landslide | Relatively Low |
| Coastal Flood | No Rating |
| Volcano | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
4 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 | 111 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 139 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 138 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | - | - | 148 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Clear Lake (149 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 149 km |
| Mono Lake Volcanic Field | Pyroclastic cone(s) | 2,121 m (6,959 ft) | 1790 | 196 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 3.9 in | Wettest |
| February | 53°F (12°C) | 3.6 in | |
| March | 57°F (14°C) | 2.8 in | |
| April | 61°F (16°C) | 1.4 in | |
| May | 68°F (20°C) | 0.9 in | |
| June | 74°F (23°C) | 0.2 in | |
| July | 78°F (26°C) | 0.0 in | Warmest, Driest |
| August | 77°F (25°C) | 0.0 in | |
| September | 74°F (23°C) | 0.2 in | |
| October | 66°F (19°C) | 0.9 in | |
| November | 55°F (13°C) | 1.8 in | |
| December | 49°F (9°C) | 3.5 in | Coldest |
Wilton has a seasonal temperature swing of 29°F / from 49°F in December to 78°F in July. Total annual precipitation is 19.2 inches, with January being the wettest month (3.9") and July the driest (0.0").