Kelseyville, CA
Full City Profile · California · Sonoma County County
2.4
/5.0
C
Fair
4,204
Population
1,455/sq mi density
$43,475
Median Income
$18,334 per capita
$240,500
Home Value
$352,537 Zillow
$1,136
Median Rent
28.6% income on rent
57°F
Avg Temperature
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.7 / 5.0
$43,475 median income, 17.3% unemployment
B+
Affordability
3.6 / 5.0
$240,500 home value, $1,136/mo rent
D
Education
1.8 / 5.0
10.2% bachelor's degree or higher
Kelseyville 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. 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 19.
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) |
Geography
| Elevation | 1,408 ft (429 m) |
| Area | 2.9 sq mi (7.5 km²) |
| Population Density | 1,455/sq mi |
| Coordinates | 38.9702°N, 122.8314°W |
| Timezone | America/Los_Angeles |
| County | Sonoma County County |
| Nearest Airport | Sacramento International (SMF) 69 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 19.0 |
| Rating | Good |
| Good Days % | 95.1% |
| Unhealthy Days | 0 |
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
1 tsunami recorded within 500 km. Highest wave on record: 0.1 m (0 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 144 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (5 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 5 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (7°C) | 6.2 in | Coldest, Wettest |
| February | 46°F (8°C) | 6.2 in | |
| March | 49°F (9°C) | 4.0 in | |
| April | 53°F (12°C) | 2.0 in | |
| May | 59°F (15°C) | 1.2 in | |
| June | 67°F (20°C) | 0.2 in | |
| July | 74°F (23°C) | 0.0 in | Warmest, Driest |
| August | 72°F (22°C) | 0.1 in | |
| September | 68°F (20°C) | 0.2 in | |
| October | 59°F (15°C) | 0.9 in | |
| November | 50°F (10°C) | 2.9 in | |
| December | 44°F (7°C) | 6.1 in |
Kelseyville has a seasonal temperature swing of 30°F / from 44°F in January to 74°F in July. Total annual precipitation is 29.9 inches, with January being the wettest month (6.2") and July the driest (0.0").