All Countries
Portola, CA
Full City Profile · California · Sierra County County
2.1
/5.0
C
Fair
2,462
Population
455/sq mi density
$42,385
Median Income
$21,378 per capita
$232,100
Home Value
$264,558 Zillow
$837
Median Rent
36.3% income on rent
47°F
Avg Temperature
326 sunny days/yr
111
Violent Crime/100K
1,015 property/100K
C
Overall
2.1 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.8 / 5.0
$42,385 median income, 8.9% unemployment
B+
Affordability
3.6 / 5.0
$232,100 home value, $837/mo rent
F
Safety
1.0 / 5.0
111 violent crimes/100K
D
Education
2.0 / 5.0
12.4% bachelor's degree or higher
Portola 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. The area gets 326 sunny days per year. 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) |
| Sunny Days | 326 days/yr |
Geography
| Elevation | 4,975 ft (1,516 m) |
| Area | 5.4 sq mi (14.0 km²) |
| Population Density | 455/sq mi |
| Coordinates | 39.8208°N, 120.4743°W |
| Timezone | America/Los_Angeles |
| County | Sierra County County |
| Nearest Airport | Reno/Tahoe International (RNO) 44 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 31.5 / 100 |
| Social Vulnerability | 63.2 / 100 |
| Community Resilience | 31.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Lassen Volcanic Center (115 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 115 km |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 141 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 4.4 in | Coldest, Wettest |
| February | 34°F (1°C) | 3.7 in | |
| March | 38°F (3°C) | 3.3 in | |
| April | 43°F (6°C) | 1.4 in | |
| May | 50°F (10°C) | 1.2 in | |
| June | 58°F (14°C) | 0.8 in | |
| July | 66°F (19°C) | 0.3 in | Warmest, Driest |
| August | 66°F (19°C) | 0.4 in | |
| September | 59°F (15°C) | 0.8 in | |
| October | 51°F (11°C) | 1.9 in | |
| November | 40°F (4°C) | 3.9 in | |
| December | 32°F (0°C) | 3.8 in |
Portola has a seasonal temperature swing of 34°F / from 31°F in January to 66°F in July. Total annual precipitation is 25.9 inches, with January being the wettest month (4.4") and July the driest (0.3").