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Day Valley, CA
Full City Profile · California · Santa Clara County County
3.2
/5.0
B
Good
3,514
Population
190/sq mi density
$150,256
Median Income
$62,813 per capita
$1,187,200
Home Value
$1,313,194 Zillow
$1,362
Median Rent
13.9% income on rent
60°F
Avg Temperature
323 sunny days/yr
296
Violent Crime/100K
6,187 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$150,256 median income, 2.4% unemployment
C
Affordability
2.2 / 5.0
$1,187,200 home value, $1,362/mo rent
F
Safety
1.0 / 5.0
296 violent crimes/100K
A+
Education
4.9 / 5.0
48.5% bachelor's degree or higher
Day Valley enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 49°F in January while summers reach 70°F in July. The area gets 323 sunny days per year. Annual precipitation totals 22.2 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 (9°C)
70°F Jul (21°C)
| Annual Average | 59.6°F |
| 10% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 323 days/yr |
Geography
| Elevation | 963 ft (294 m) |
| Area | 18.5 sq mi (47.9 km²) |
| Population Density | 190/sq mi |
| Coordinates | 37.0254°N, 121.8559°W |
| Timezone | America/Los_Angeles |
| County | Santa Clara County County |
| Nearest Airport | Norman Y Mineta San Jose International (SJC) 24 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
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 | 78 km |
| 1989 | N. CALIFORNIA | Earthquake | 1.0 m | 62 | 3 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | — | 66 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | — | 94 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | — | — | 20 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 6.6 in | Wettest |
| February | 50°F (10°C) | 5.4 in | |
| March | 51°F (11°C) | 5.0 in | |
| April | 54°F (12°C) | 2.2 in | |
| May | 58°F (15°C) | 0.5 in | |
| June | 62°F (17°C) | 0.2 in | |
| July | 70°F (21°C) | 0.1 in | Warmest, Driest |
| August | 67°F (19°C) | 0.1 in | |
| September | 65°F (18°C) | 0.4 in | |
| October | 61°F (16°C) | 1.6 in | |
| November | 54°F (12°C) | 4.5 in | |
| December | 49°F (9°C) | 4.9 in | Coldest |
Day Valley has a seasonal temperature swing of 22°F / from 49°F in December to 70°F in July. Total annual precipitation is 31.5 inches, with January being the wettest month (6.6") and July the driest (0.1").