Cromberg, CA
Full City Profile · California · Plumas County County
2.6
/5.0
C+
Fair
262
Population
29/sq mi density
$376,600
Home Value
$401,404 Zillow
47°F
Avg Temperature
C+
Overall
2.6 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Education
2.6 / 5.0
20.5% bachelor's degree or higher
Cromberg experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 31°F in January while summers reach 66°F in July. Annual precipitation totals 23.3 inches. The area receives 37.8 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
31°F Jan (-0°C)
66°F Jul (19°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 66°F (19°C) |
Geography
| Elevation | 4,848 ft (1,478 m) |
| Area | 9.0 sq mi (23.3 km²) |
| Population Density | 29/sq mi |
| Coordinates | 39.8684°N, 120.6904°W |
| Timezone | America/Los_Angeles |
| County | Plumas County County |
| Nearest Airport | Reno/Tahoe International (RNO) 55 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
| Good Days % | 51.4% |
| Unhealthy Days | 16 |
Air Pollutants (EPA 2023)
| PM2.5 (Fine Particles) | 14.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.4 / 100 |
| Social Vulnerability | 91.4 / 100 |
| Community Resilience | 69.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Lassen Volcanic Center (98 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 98 km |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 160 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 4.2 in | |
| February | 34°F (1°C) | 3.9 in | |
| March | 38°F (4°C) | 3.6 in | |
| April | 43°F (6°C) | 1.6 in | |
| May | 51°F (11°C) | 1.2 in | |
| June | 59°F (15°C) | 0.5 in | |
| July | 66°F (19°C) | 0.3 in | Warmest |
| August | 64°F (18°C) | 0.3 in | Driest |
| September | 58°F (14°C) | 0.4 in | |
| October | 48°F (9°C) | 1.1 in | |
| November | 38°F (4°C) | 2.0 in | |
| December | 31°F (-1°C) | 4.3 in | Coldest, Wettest |
Cromberg has a seasonal temperature swing of 35°F / from 31°F in December to 66°F in July. Total annual precipitation is 23.3 inches, with December being the wettest month (4.3") and August the driest (0.3").