Tamalpais-Homestead Valley, CA
Full City Profile · California · San Mateo County County
3.9
/5.0
B+
Good
12,153
Population
2,591/sq mi density
$238,158
Median Income
$114,931 per capita
$1,811,100
Home Value
$2,016,416 Zillow
$2,990
Median Rent
22.4% income on rent
58°F
Avg Temperature
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$238,158 median income, 5.7% unemployment
C
Affordability
2.4 / 5.0
$1,811,100 home value, $2,990/mo rent
A+
Education
5.0 / 5.0
79.1% bachelor's degree or higher
Tamalpais-Homestead Valley enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 52°F in January while summers reach 60°F in July. Annual precipitation totals 36.2 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 27.
Temperature
52°F Jan (11°C)
60°F Jul (16°C)
| Annual Average | 57.7°F |
| 7% above US avg | |
| January Average | 52°F (11°C) |
| July Average | 60°F (16°C) |
Geography
| Elevation | 32 ft (10 m) |
| Area | 4.7 sq mi (12.1 km²) |
| Population Density | 2,591/sq mi |
| Coordinates | 37.8791°N, 122.5379°W |
| Timezone | America/Los_Angeles |
| County | San Mateo County County |
| Nearest Airport | San Francisco International (SFO) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 27.0 |
| Rating | Good |
| Good Days % | 88.1% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0332 ppm |
| NO₂ (Nitrogen Dioxide) | 12.1 ppb |
| CO (Carbon Monoxide) | 0.34 ppm |
| PM2.5 (Fine Particles) | 4.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 99.2 / 100 |
| Social Vulnerability | 20.5 / 100 |
| Community Resilience | 97.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Moderate |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively 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 High |
| Tsunami | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
5 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 | 43 km |
| 1989 | N. CALIFORNIA | Earthquake | 1.0 m | 62 | 110 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 47 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 20 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | - | - | 94 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (123 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 123 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 52°F (11°C) | 6.6 in | Coldest |
| February | 54°F (12°C) | 6.8 in | |
| March | 56°F (13°C) | 4.6 in | |
| April | 56°F (14°C) | 2.3 in | |
| May | 58°F (14°C) | 1.4 in | |
| June | 60°F (15°C) | 0.5 in | |
| July | 60°F (16°C) | 0.0 in | Driest |
| August | 62°F (17°C) | 0.1 in | |
| September | 63°F (17°C) | 0.2 in | Warmest |
| October | 62°F (17°C) | 1.7 in | |
| November | 57°F (14°C) | 4.2 in | |
| December | 53°F (11°C) | 7.9 in | Wettest |
Tamalpais-Homestead Valley has a seasonal temperature swing of 11°F / from 52°F in January to 63°F in September. Total annual precipitation is 36.2 inches, with December being the wettest month (7.9") and July the driest (0.0").