Lost River, ID
Full City Profile · Idaho · Butte County County
2.9
/5.0
C+
Fair
51
Population
6/sq mi density
43°F
Avg Temperature
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Education
2.9 / 5.0
23.4% bachelor's degree or higher
Lost River has a cool climate with an average annual temperature of 43°F (6°C). Winters average 20°F in January while summers reach 70°F in July. Annual precipitation totals 15.5 inches. The area receives 80.3 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
20°F Jan (-7°C)
70°F Jul (21°C)
| Annual Average | 43.0°F |
| 20% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 6,472 ft (1,973 m) |
| Area | 3.4 sq mi (8.7 km²) |
| Population Density | 6/sq mi |
| Coordinates | 43.6883°N, 113.6353°W |
| Timezone | America/Boise |
| County | Butte County County |
| Nearest Airport | Pocatello Regional (PIH) 75 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
| Good Days % | 84.9% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0509 ppm |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 4.4 / 100 |
| Social Vulnerability | 45.7 / 100 |
| Community Resilience | 13.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Craters of the Moon (32 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 32 km |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 81 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 96 km |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 98 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 2.4 in | Coldest, Wettest |
| February | 22°F (-5°C) | 1.2 in | |
| March | 32°F (-0°C) | 2.0 in | |
| April | 41°F (5°C) | 1.1 in | |
| May | 51°F (11°C) | 1.6 in | |
| June | 59°F (15°C) | 1.2 in | |
| July | 70°F (21°C) | 0.3 in | Warmest, Driest |
| August | 68°F (20°C) | 0.5 in | |
| September | 58°F (15°C) | 0.7 in | |
| October | 45°F (7°C) | 1.2 in | |
| November | 31°F (-1°C) | 1.2 in | |
| December | 20°F (-6°C) | 2.0 in |
Lost River has a seasonal temperature swing of 49°F / from 20°F in January to 70°F in July. Total annual precipitation is 15.5 inches, with January being the wettest month (2.4") and July the driest (0.3").