Idaho City, ID
Full City Profile · Idaho · Boise County County
3.6
/5.0
B+
Good
556
Population
830/sq mi density
$41,111
Median Income
$28,584 per capita
$94,500
Home Value
$399,873 Zillow
$776
Median Rent
27.7% income on rent
44°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$41,111 median income, 0.8% unemployment
A+
Affordability
5.0 / 5.0
$94,500 home value, $776/mo rent
D
Education
1.9 / 5.0
11.0% bachelor's degree or higher
Idaho City has a cool climate with an average annual temperature of 44°F (7°C). Winters average 24°F in January while summers reach 66°F in July. Annual precipitation totals 21.1 inches. The area receives 116.7 inches of snow annually. Air quality is rated Good with a median AQI of 48.
Temperature
24°F Jan (-4°C)
66°F Jul (19°C)
| Annual Average | 43.9°F |
| 19% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 66°F (19°C) |
Geography
| Elevation | 3,984 ft (1,214 m) |
| Area | 0.7 sq mi (1.7 km²) |
| Population Density | 830/sq mi |
| Coordinates | 43.8278°N, 115.8305°W |
| Timezone | America/Boise |
| County | Boise County County |
| Nearest Airport | Boise Air Trml/Gowen Field (BOI) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
| Good Days % | 51.6% |
| Unhealthy Days | 49 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 48.9 / 100 |
| Social Vulnerability | 33.3 / 100 |
| Community Resilience | 13.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Black Butte Crater Lava Field (139 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 139 km |
| Jordan Craters | Volcanic field | 1,473 m (4,833 ft) | -1250 | 152 km |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.2 in | |
| February | 28°F (-2°C) | 1.9 in | |
| March | 35°F (2°C) | 2.3 in | |
| April | 42°F (5°C) | 1.6 in | |
| May | 51°F (10°C) | 2.1 in | |
| June | 58°F (14°C) | 1.1 in | |
| July | 66°F (19°C) | 0.3 in | Warmest, Driest |
| August | 65°F (18°C) | 0.4 in | |
| September | 56°F (13°C) | 0.8 in | |
| October | 45°F (7°C) | 1.5 in | |
| November | 33°F (0°C) | 2.4 in | |
| December | 24°F (-4°C) | 3.5 in | Coldest, Wettest |
Idaho City has a seasonal temperature swing of 42°F / from 24°F in December to 66°F in July. Total annual precipitation is 21.1 inches, with December being the wettest month (3.5") and July the driest (0.3").