Graton, CA
Full City Profile · California · Sonoma County County
3.6
/5.0
B+
Good
1,819
Population
1,151/sq mi density
$108,750
Median Income
$64,330 per capita
$911,300
Home Value
$780,755 Zillow
$2,770
Median Rent
18.0% income on rent
58°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$108,750 median income, 1.8% unemployment
D
Affordability
1.9 / 5.0
$911,300 home value, $2,770/mo rent
A+
Education
4.5 / 5.0
44.2% bachelor's degree or higher
Graton enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 48°F in January while summers reach 68°F in July. Annual precipitation totals 33.8 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 19.
Temperature
48°F Jan (9°C)
68°F Jul (20°C)
| Annual Average | 58.1°F |
| 8% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 205 ft (62 m) |
| Area | 1.6 sq mi (4.1 km²) |
| Population Density | 1,151/sq mi |
| Coordinates | 38.4375°N, 122.8660°W |
| Timezone | America/Los_Angeles |
| County | Sonoma County County |
| Nearest Airport | Metro Oakland International (OAK) 61 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 19.0 |
| Rating | Good |
| Good Days % | 95.1% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0321 ppm |
| NO₂ (Nitrogen Dioxide) | 5.8 ppb |
| CO (Carbon Monoxide) | 0.29 ppm |
| PM2.5 (Fine Particles) | 5.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 99.1 / 100 |
| Social Vulnerability | 29.8 / 100 |
| Community Resilience | 66.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively High |
| Wildfire | Relatively High |
| Flood | Relatively High |
| Hail | Very 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 High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Very Low |
| Volcano | 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: 4.5 m (15 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1868 | N. CALIFORNIA | Eruption + Earthquake | 4.5 m | 30 | 106 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 116 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 88 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (60 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 60 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 6.7 in | |
| February | 51°F (10°C) | 6.7 in | |
| March | 53°F (12°C) | 4.6 in | |
| April | 56°F (13°C) | 2.1 in | |
| May | 61°F (16°C) | 1.3 in | |
| June | 66°F (19°C) | 0.3 in | |
| July | 68°F (20°C) | 0.0 in | Driest |
| August | 68°F (20°C) | 0.1 in | Warmest |
| September | 67°F (19°C) | 0.1 in | |
| October | 61°F (16°C) | 1.7 in | |
| November | 53°F (12°C) | 3.6 in | |
| December | 47°F (8°C) | 6.8 in | Coldest, Wettest |
Graton has a seasonal temperature swing of 21°F / from 47°F in December to 68°F in August. Total annual precipitation is 33.8 inches, with December being the wettest month (6.8") and July the driest (0.0").