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Plymouth, CA
Full City Profile · California · Amador County County
3.1
/5.0
B
Good
1,250
Population
472/sq mi density
$81,250
Median Income
$37,332 per capita
$358,200
Home Value
$570,359 Zillow
$1,299
Median Rent
26.3% income on rent
61°F
Avg Temperature
302 sunny days/yr
123
Violent Crime/100K
1,723 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$81,250 median income, 2.6% unemployment
A
Affordability
4.2 / 5.0
$358,200 home value, $1,299/mo rent
F
Safety
1.0 / 5.0
123 violent crimes/100K
C+
Education
2.9 / 5.0
23.6% bachelor's degree or higher
Plymouth enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 47°F in January while summers reach 78°F in July. The area gets 302 sunny days per year. Annual precipitation totals 32.0 inches. Air quality is rated Good with a median AQI of 48.
Temperature
47°F Jan (8°C)
78°F Jul (26°C)
| Annual Average | 61.0°F |
| 13% above US avg | |
| January Average | 47°F (8°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 1,049 ft (320 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 472/sq mi |
| Coordinates | 38.4717°N, 120.8572°W |
| Timezone | America/Los_Angeles |
| County | Amador County County |
| Nearest Airport | Sacramento International (SMF) 43 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0404 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 79.2 / 100 |
| Social Vulnerability | 43.9 / 100 |
| Community Resilience | 35.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Drought | Relatively High |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami 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 | 139 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Mono Lake Volcanic Field (168 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Mono Lake Volcanic Field | Pyroclastic cone(s) | 2,121 m (6,959 ft) | 1790 | 168 km |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 175 km |
| Mono-Inyo Craters | Lava dome(s) | 2,796 m (9,173 ft) | 1380 | 176 km |
| Mammoth Mountain | Lava dome(s) | 3,369 m (11,053 ft) | 1260 | 185 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 47°F (8°C) | 5.0 in | Wettest |
| February | 50°F (10°C) | 4.3 in | |
| March | 53°F (12°C) | 4.5 in | |
| April | 58°F (14°C) | 2.0 in | |
| May | 65°F (18°C) | 0.7 in | |
| June | 72°F (22°C) | 0.2 in | |
| July | 78°F (26°C) | 0.1 in | Warmest, Driest |
| August | 76°F (25°C) | 0.1 in | |
| September | 72°F (22°C) | 0.5 in | |
| October | 64°F (18°C) | 1.6 in | |
| November | 53°F (11°C) | 3.8 in | |
| December | 46°F (8°C) | 3.7 in | Coldest |
Plymouth has a seasonal temperature swing of 33°F / from 46°F in December to 78°F in July. Total annual precipitation is 26.6 inches, with January being the wettest month (5.0") and July the driest (0.1").