All Countries
Cobb, CA
Full City Profile · California · Sonoma County County
3.5
/5.0
B+
Good
928
Population
186/sq mi density
$113,375
Median Income
$47,930 per capita
$377,000
Home Value
$307,769 Zillow
57°F
Avg Temperature
326 sunny days/yr
650
Violent Crime/100K
4,566 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$113,375 median income, 5.3% unemployment
A+
Affordability
4.8 / 5.0
$377,000 home value, /mo rent
F
Safety
1.0 / 5.0
650 violent crimes/100K (71% above avg)
B+
Education
3.8 / 5.0
34.4% bachelor's degree or higher
Cobb enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 44°F in January while summers reach 74°F in July. The area gets 326 sunny days per year. Annual precipitation totals 29.9 inches. The area receives 0.4 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
44°F Jan (7°C)
74°F Jul (23°C)
| Annual Average | 56.9°F |
| 5% above US avg | |
| January Average | 44°F (7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 326 days/yr |
Geography
| Elevation | 2,939 ft (896 m) |
| Area | 5.0 sq mi (12.9 km²) |
| Population Density | 186/sq mi |
| Coordinates | 38.8353°N, 122.7224°W |
| Timezone | America/Los_Angeles |
| County | Sonoma County County |
| Nearest Airport | Sacramento International (SMF) 62 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
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
2 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 | 137 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | — | 128 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (16 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 16 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (7°C) | 8.1 in | Wettest |
| February | 45°F (7°C) | 6.1 in | |
| March | 47°F (8°C) | 5.3 in | |
| April | 51°F (10°C) | 2.4 in | |
| May | 57°F (14°C) | 0.6 in | |
| June | 64°F (18°C) | 0.3 in | |
| July | 74°F (23°C) | 0.1 in | Warmest, Driest |
| August | 71°F (21°C) | 0.2 in | |
| September | 66°F (19°C) | 0.7 in | |
| October | 59°F (15°C) | 2.4 in | |
| November | 49°F (9°C) | 6.2 in | |
| December | 44°F (6°C) | 7.0 in | Coldest |
Cobb has a seasonal temperature swing of 30°F / from 44°F in December to 74°F in July. Total annual precipitation is 39.3 inches, with January being the wettest month (8.1") and July the driest (0.1").