Green Valley CDP (Solano County), CA
Full City Profile · California · Napa County County
3.6
/5.0
B+
Good
1,443
Population
172/sq mi density
$114,500
Median Income
$89,706 per capita
$1,168,500
Home Value
$736,678 Zillow
58°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$114,500 median income, 0.0% unemployment
F
Affordability
1.0 / 5.0
$1,168,500 home value, /mo rent
A+
Education
5.0 / 5.0
50.8% bachelor's degree or higher
Green Valley CDP (Solano County) enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 48°F in January while summers reach 67°F in July. Annual precipitation totals 20.2 inches. The area receives 0.0 inches of snow annually.
Temperature
48°F Jan (9°C)
67°F Jul (19°C)
| Annual Average | 57.7°F |
| 7% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 67°F (19°C) |
Geography
| Elevation | 296 ft (90 m) |
| Area | 8.4 sq mi (21.7 km²) |
| Population Density | 172/sq mi |
| Coordinates | 38.2638°N, 122.1625°W |
| Timezone | America/Los_Angeles |
| County | Napa County County |
| Nearest Airport | Metro Oakland International (OAK) 38 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
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 | 63 km |
| 1989 | N. CALIFORNIA | Earthquake | 1.0 m | 62 | 139 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 86 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 69 km |
| 1865 | N. CALIFORNIA | Eruption + Earthquake | - | - | 121 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Clear Lake (95 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 95 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 4.2 in | Wettest |
| February | 50°F (10°C) | 4.0 in | |
| March | 53°F (12°C) | 3.0 in | |
| April | 56°F (13°C) | 1.3 in | |
| May | 61°F (16°C) | 0.8 in | |
| June | 65°F (18°C) | 0.2 in | |
| July | 67°F (19°C) | 0.0 in | Driest |
| August | 67°F (20°C) | 0.0 in | Warmest |
| September | 66°F (19°C) | 0.1 in | |
| October | 61°F (16°C) | 0.9 in | |
| November | 53°F (12°C) | 2.0 in | |
| December | 48°F (9°C) | 3.8 in | Coldest |
Green Valley CDP (Solano County) has a seasonal temperature swing of 20°F / from 48°F in December to 67°F in August. Total annual precipitation is 20.2 inches, with January being the wettest month (4.2") and July the driest (0.0").