Middletown, CA
Full City Profile · California · Sonoma County County
3.6
/5.0
B+
Good
1,659
Population
902/sq mi density
$170,605
Median Income
$45,965 per capita
$481,900
Home Value
$291,544 Zillow
$2,197
Median Rent
16.8% income on rent
60°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$170,605 median income, 9.8% unemployment
A+
Affordability
5.0 / 5.0
$481,900 home value, $2,197/mo rent
C
Education
2.0 / 5.0
12.8% bachelor's degree or higher
Middletown enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 49°F in January while summers reach 72°F in July. Annual precipitation totals 42.6 inches. The area receives 0.3 inches of snow annually. Air quality is rated Good with a median AQI of 19.
Temperature
49°F Jan (10°C)
72°F Jul (22°C)
| Annual Average | 60.1°F |
| 11% above US avg | |
| January Average | 49°F (10°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 1,107 ft (337 m) |
| Area | 1.8 sq mi (4.8 km²) |
| Population Density | 902/sq mi |
| Coordinates | 38.7519°N, 122.6221°W |
| Timezone | America/Los_Angeles |
| County | Sonoma County County |
| Nearest Airport | Sacramento International (SMF) 56 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
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 | 126 km |
| 1856 | N. CALIFORNIA | Eruption + Earthquake | 0.6 m | - | 142 km |
| 1906 | N. CALIFORNIA | Eruption + Earthquake | 0.1 m | - | 117 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 | 49°F (10°C) | 9.2 in | Wettest |
| February | 51°F (11°C) | 8.1 in | |
| March | 54°F (12°C) | 5.4 in | |
| April | 57°F (14°C) | 3.0 in | |
| May | 63°F (17°C) | 1.7 in | |
| June | 69°F (20°C) | 0.3 in | |
| July | 72°F (22°C) | 0.0 in | Warmest, Driest |
| August | 72°F (22°C) | 0.0 in | |
| September | 70°F (21°C) | 0.1 in | |
| October | 63°F (17°C) | 1.9 in | |
| November | 54°F (12°C) | 4.1 in | |
| December | 48°F (9°C) | 8.9 in | Coldest |
Middletown has a seasonal temperature swing of 24°F / from 48°F in December to 72°F in July. Total annual precipitation is 42.6 inches, with January being the wettest month (9.2") and July the driest (0.0").