Little Grass Valley, CA
Full City Profile · California · Plumas County County
5.0
/5.0
A+
Excellent
10
Population
1/sq mi density
53°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Education
5.0 / 5.0
0.0% bachelor's degree or higher
Little Grass Valley experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 39°F in January while summers reach 70°F in July. Annual precipitation totals 64.9 inches. The area receives 26.2 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
39°F Jan (4°C)
70°F Jul (21°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 5,342 ft (1,628 m) |
| Area | 3.9 sq mi (10.0 km²) |
| Population Density | 1/sq mi |
| Coordinates | 39.7252°N, 120.9591°W |
| Timezone | America/Los_Angeles |
| County | Plumas County County |
| Nearest Airport | Chico Regional (CIC) 50 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
3 volcanoes within 200 km. Closest: Lassen Volcanic Center (97 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 97 km |
| Clear Lake | Volcanic field | 1,439 m (4,721 ft) | Unknown | 177 km |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 180 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 11.3 in | |
| February | 42°F (5°C) | 10.7 in | |
| March | 45°F (7°C) | 10.0 in | |
| April | 50°F (10°C) | 5.3 in | |
| May | 57°F (14°C) | 3.7 in | |
| June | 64°F (18°C) | 1.1 in | |
| July | 70°F (21°C) | 0.1 in | Warmest, Driest |
| August | 69°F (21°C) | 0.2 in | |
| September | 65°F (18°C) | 0.7 in | |
| October | 55°F (13°C) | 3.3 in | |
| November | 44°F (7°C) | 6.8 in | |
| December | 38°F (3°C) | 11.8 in | Coldest, Wettest |
Little Grass Valley has a seasonal temperature swing of 33°F / from 38°F in December to 70°F in July. Total annual precipitation is 64.9 inches, with December being the wettest month (11.8") and July the driest (0.1").