Castella, CA
Full City Profile · California · Siskiyou County County
3.4
/5.0
B
Good
287
Population
256/sq mi density
$65,556
Median Income
$40,554 per capita
$354,300
Home Value
$235,461 Zillow
$810
Median Rent
20.4% income on rent
54°F
Avg Temperature
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$65,556 median income, 3.6% unemployment
B+
Affordability
3.6 / 5.0
$354,300 home value, $810/mo rent
C+
Education
2.6 / 5.0
19.9% bachelor's degree or higher
Castella experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 39°F in January while summers reach 72°F in July. Annual precipitation totals 63.3 inches. The area receives 26.7 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
39°F Jan (4°C)
72°F Jul (22°C)
| Annual Average | 53.9°F |
| 0% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 2,151 ft (656 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 256/sq mi |
| Coordinates | 41.1772°N, 122.2872°W |
| Timezone | America/Los_Angeles |
| County | Siskiyou County County |
| Nearest Airport | Redding Regional (RDD) 47 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
| Good Days % | 80.3% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0394 ppm |
| PM2.5 (Fine Particles) | 11.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 89.0 / 100 |
| Social Vulnerability | 79.4 / 100 |
| Community Resilience | 44.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Volcano | Relatively High |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Shasta (27 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Shasta | Stratovolcano | 4,317 m (14,163 ft) | 1250 | 27 km |
| Medicine Lake | Shield | 2,412 m (7,913 ft) | 1060 | 78 km |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 101 km |
| Crater Lake | Caldera | 2,487 m (8,159 ft) | -2850 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 11.1 in | |
| February | 42°F (5°C) | 10.5 in | |
| March | 45°F (7°C) | 9.2 in | |
| April | 50°F (10°C) | 4.9 in | |
| May | 58°F (15°C) | 2.8 in | |
| June | 66°F (19°C) | 1.3 in | |
| July | 72°F (22°C) | 0.2 in | Warmest, Driest |
| August | 70°F (21°C) | 0.2 in | |
| September | 65°F (18°C) | 0.7 in | |
| October | 55°F (13°C) | 3.0 in | |
| November | 45°F (7°C) | 6.9 in | |
| December | 39°F (4°C) | 12.6 in | Coldest, Wettest |
Castella has a seasonal temperature swing of 33°F / from 39°F in December to 72°F in July. Total annual precipitation is 63.3 inches, with December being the wettest month (12.6") and July the driest (0.2").