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Hidden Valley Lake, CA
Full City Profile · California · Napa County County
2.8
/5.0
C+
Fair
5,896
Population
600/sq mi density
$72,365
Median Income
$37,821 per capita
$394,900
Home Value
$365,544 Zillow
$2,261
Median Rent
51.0% income on rent
57°F
Avg Temperature
326 sunny days/yr
650
Violent Crime/100K
4,566 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$72,365 median income, 6.3% unemployment
B+
Affordability
3.6 / 5.0
$394,900 home value, $2,261/mo rent
F
Safety
1.0 / 5.0
650 violent crimes/100K (71% above avg)
C+
Education
3.0 / 5.0
24.9% bachelor's degree or higher
Hidden Valley Lake 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 | 1,117 ft (340 m) |
| Area | 9.8 sq mi (25.4 km²) |
| Population Density | 600/sq mi |
| Coordinates | 38.8015°N, 122.5514°W |
| Timezone | America/Los_Angeles |
| County | Napa County County |
| Nearest Airport | Sacramento International (SMF) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.3 / 100 |
| Social Vulnerability | 38.5 / 100 |
| Community Resilience | 76.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Moderate |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Drought | Very High |
| Cold Wave | No Rating |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Very Low |
| Volcano | Very 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 | 129 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | — | 146 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | — | 123 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (27 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 27 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (7°C) | 8.5 in | Coldest, Wettest |
| February | 47°F (8°C) | 6.3 in | |
| March | 49°F (10°C) | 5.4 in | |
| April | 53°F (12°C) | 2.4 in | |
| May | 60°F (15°C) | 0.6 in | |
| June | 67°F (19°C) | 0.2 in | |
| July | 74°F (23°C) | 0.0 in | Warmest, Driest |
| August | 72°F (22°C) | 0.2 in | |
| September | 68°F (20°C) | 0.6 in | |
| October | 60°F (16°C) | 2.2 in | |
| November | 50°F (10°C) | 5.8 in | |
| December | 45°F (7°C) | 6.7 in |
Hidden Valley Lake has a seasonal temperature swing of 30°F / from 44°F in January to 74°F in July. Total annual precipitation is 38.9 inches, with January being the wettest month (8.5") and July the driest (0.0").