Boyes Hot Springs, CA
Full City Profile · California · Napa County County
3.1
/5.0
B
Good
7,031
Population
6,633/sq mi density
$89,568
Median Income
$43,990 per capita
$738,800
Home Value
$928,404 Zillow
$1,802
Median Rent
32.3% income on rent
59°F
Avg Temperature
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$89,568 median income, 3.6% unemployment
C
Affordability
2.0 / 5.0
$738,800 home value, $1,802/mo rent
C+
Education
3.0 / 5.0
24.8% bachelor's degree or higher
Boyes Hot Springs enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 48°F in January while summers reach 70°F in July. Annual precipitation totals 28.4 inches. The area receives 0.0 inches of snow annually.
Temperature
48°F Jan (9°C)
70°F Jul (21°C)
| Annual Average | 59.0°F |
| 9% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 115 ft (35 m) |
| Area | 1.1 sq mi (2.7 km²) |
| Population Density | 6,633/sq mi |
| Coordinates | 38.3126°N, 122.4887°W |
| Timezone | America/Los_Angeles |
| County | Napa County County |
| Nearest Airport | Metro Oakland International (OAK) 43 miles away |
Precipitation & Snow
Air Quality
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
4 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 | 76 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 92 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 68 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | - | - | 134 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (77 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 77 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 5.5 in | |
| February | 51°F (10°C) | 5.4 in | |
| March | 54°F (12°C) | 3.8 in | |
| April | 57°F (14°C) | 1.8 in | |
| May | 62°F (16°C) | 1.0 in | |
| June | 67°F (20°C) | 0.3 in | |
| July | 70°F (21°C) | 0.0 in | Warmest, Driest |
| August | 70°F (21°C) | 0.1 in | |
| September | 68°F (20°C) | 0.1 in | |
| October | 63°F (17°C) | 1.5 in | |
| November | 54°F (12°C) | 3.0 in | |
| December | 47°F (9°C) | 5.8 in | Coldest, Wettest |
Boyes Hot Springs has a seasonal temperature swing of 22°F / from 47°F in December to 70°F in July. Total annual precipitation is 28.4 inches, with December being the wettest month (5.8") and July the driest (0.0").