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Alta, CA
Full City Profile · California · Nevada County County
3.3
/5.0
B
Good
740
Population
311/sq mi density
$94,718
Median Income
$74,590 per capita
$468,200
Home Value
$455,116 Zillow
52°F
Avg Temperature
276 sunny days/yr
1,178
Violent Crime/100K
3,110 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$94,718 median income, 4.8% unemployment
B+
Affordability
3.9 / 5.0
$468,200 home value, /mo rent
F
Safety
1.0 / 5.0
1,178 violent crimes/100K (210% above avg)
B+
Education
3.8 / 5.0
35.1% bachelor's degree or higher
Alta experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 40°F in January while summers reach 70°F in July. The area gets 276 sunny days per year. Annual precipitation totals 62.4 inches. Air quality is rated Good with a median AQI of 48.
Temperature
40°F Jan (5°C)
70°F Jul (21°C)
| Annual Average | 52.2°F |
| 3% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 3,796 ft (1,157 m) |
| Area | 2.4 sq mi (6.2 km²) |
| Population Density | 311/sq mi |
| Coordinates | 39.2157°N, 120.7985°W |
| Timezone | America/Los_Angeles |
| County | Nevada County County |
| Nearest Airport | Sacramento International (SMF) 56 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0473 ppm |
| PM2.5 (Fine Particles) | 4.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 89.9 / 100 |
| Social Vulnerability | 43.5 / 100 |
| Community Resilience | 65.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Lassen Volcanic Center (154 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 154 km |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 169 km |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 172 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 11.5 in | Wettest |
| February | 41°F (5°C) | 9.3 in | |
| March | 42°F (6°C) | 8.6 in | |
| April | 47°F (8°C) | 4.4 in | |
| May | 54°F (12°C) | 2.2 in | |
| June | 61°F (16°C) | 0.8 in | |
| July | 70°F (21°C) | 0.2 in | Warmest, Driest |
| August | 69°F (21°C) | 0.4 in | |
| September | 64°F (18°C) | 1.1 in | |
| October | 57°F (14°C) | 3.4 in | |
| November | 46°F (8°C) | 8.3 in | |
| December | 40°F (5°C) | 9.7 in | Coldest |
Alta has a seasonal temperature swing of 30°F / from 40°F in December to 70°F in July. Total annual precipitation is 59.9 inches, with January being the wettest month (11.5") and July the driest (0.2").