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Arco, ID
Full City Profile · Idaho · Butte County County
2.4
/5.0
C
Fair
842
Population
787/sq mi density
$31,023
Median Income
$27,842 per capita
$157,700
Home Value
$313,546 Zillow
44°F
Avg Temperature
310 sunny days/yr
51
Violent Crime/100K
617 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
C
Economy
2.4 / 5.0
$31,023 median income, 0.2% unemployment
B+
Affordability
3.8 / 5.0
$157,700 home value, /mo rent
F
Safety
1.0 / 5.0
51 violent crimes/100K
C
Education
2.2 / 5.0
15.3% bachelor's degree or higher
Arco has a cool climate with an average annual temperature of 44°F (7°C). Winters average 19°F in January while summers reach 69°F in July. The area gets 310 sunny days per year. Annual precipitation totals 8.8 inches. The area receives 23.8 inches of snow annually. Air quality is rated Good with a median AQI of 33.
Temperature
19°F Jan (-7°C)
69°F Jul (21°C)
| Annual Average | 43.7°F |
| 19% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 5,315 ft (1,620 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 787/sq mi |
| Coordinates | 43.6319°N, 113.3010°W |
| Timezone | America/Boise |
| County | Butte County County |
| Nearest Airport | Pocatello Regional (PIH) 61 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
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 (29 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 29 km |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 70 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 84 km |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 99 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.0 in | Coldest |
| February | 22°F (-5°C) | 1.0 in | |
| March | 32°F (0°C) | 0.8 in | |
| April | 41°F (5°C) | 0.8 in | |
| May | 50°F (10°C) | 1.3 in | Wettest |
| June | 59°F (15°C) | 1.3 in | |
| July | 69°F (21°C) | 0.8 in | Warmest |
| August | 67°F (19°C) | 0.8 in | |
| September | 57°F (14°C) | 0.8 in | |
| October | 46°F (8°C) | 0.6 in | Driest |
| November | 32°F (-0°C) | 0.9 in | |
| December | 20°F (-7°C) | 1.1 in |
Arco has a seasonal temperature swing of 51°F / from 19°F in January to 69°F in July. Total annual precipitation is 11.0 inches, with May being the wettest month (1.3") and October the driest (0.6").