Weather & Climate in Arimo, ID

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Arimo experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 23°F in January while summers reach 70°F in July. Annual precipitation totals 15.5 inches (drier than the 38-inch national average). The area receives 44.7 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 39. 78% of days have good air quality. The city sits at an elevation of 4,746 feet.

Temperature

23°F Jan (-5°C) 70°F Jul (21°C)
Annual Average46.1°F
15% below US avg
January Average23°F (-5°C)
July Average70°F (21°C)

Geography

Elevation4,746 ft (1,447 m)
Area0.4 sq mi (1.1 km²)
Population Density658/sq mi
Coordinates42.5604°N, 112.1729°W
TimezoneAmerica/Boise
CountyBannock County County
Nearest AirportPocatello Regional (PIH)
32 miles away

Precipitation & Snow

Annual Rainfall 15.5"
59% below US avg
Snowfall 44.7"
Wettest Month (May) 2.01"
Driest Month (Jul) 0.60"

Air Quality

AQI Median39.0
RatingGood
Good Days %78.1%
Unhealthy Days2

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score66.9 / 100
Social Vulnerability17.9 / 100
Community Resilience59.2 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Low
Wildfire Relatively Moderate
Flood Relatively Low
Hail Relatively Low
Strong Wind Very Low
Heat Wave Relatively Moderate
Winter Weather Relatively High
Lightning Relatively Moderate
Ice Storm Very Low
Drought Very Low
Cold Wave Relatively Moderate
Landslide Very Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

1,269 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Feb 3, 1994 4 km SSE of Auburn, Wyoming M5.8 100 km 8 km
Apr 21, 2001 29 km WSW of Freedom, Idaho M5.3 75 km 1 km
Sep 2, 2017 12 km E of Soda Springs, Idaho M5.3 60 km 10 km
Sep 10, 2017 9 km NNW of Georgetown, Idaho M5.0 62 km 10 km
Apr 15, 2010 9 km NE of Randolph, Utah M4.9 130 km 10 km
Feb 11, 1994 3 km SSE of Auburn, Wyoming M4.8 99 km 5 km
Sep 11, 2017 9 km NW of Georgetown, Idaho M4.7 60 km 8 km
Feb 4, 1994 4 km WNW of Fairview, Wyoming M4.7 95 km 5 km
Sep 10, 2017 12 km ESE of Soda Springs, Idaho M4.7 58 km 5 km
Sep 3, 2017 15 km ESE of Soda Springs, Idaho M4.7 61 km 10 km
Sep 3, 2017 10 km E of Soda Springs, Idaho M4.7 58 km 8 km
Sep 6, 2017 11 km NNW of Georgetown, Idaho M4.6 60 km 10 km
Sep 4, 2017 13 km ESE of Soda Springs, Idaho M4.5 59 km 6 km
Feb 7, 1994 4 km SW of Fairview, Wyoming M4.5 95 km 5 km
Feb 3, 1994 2 km SW of Auburn, Wyoming M4.4 97 km 5 km
Jan 26, 2018 5 km NNW of Georgetown, Idaho M4.4 64 km 10 km
Feb 10, 1994 3 km WSW of Auburn, Wyoming M4.4 95 km 5 km
Nov 10, 1992 32 km WNW of Freedom, Idaho M4.4 85 km 10 km
Feb 3, 1994 0 km NNE of Auburn, Wyoming M4.4 100 km 5 km
Feb 3, 1994 13 km WSW of Auburn, Wyoming M4.4 87 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

61 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 4 injuries.

Date Rating Distance Path Fatalities
Aug 17, 1990 EF2 59 km 4.0 mi 0
Feb 14, 2000 EF1 88 km 12.0 mi 0
Feb 14, 2000 EF1 69 km 14.0 mi 0
Feb 14, 2000 EF1 80 km 9.0 mi 0
Jul 20, 1999 EF1 58 km 2.5 mi 0
Jun 11, 1993 EF1 22 km 10.0 mi 0
Sep 17, 1989 EF1 67 km 0.2 mi 0
May 29, 1987 EF1 70 km 0.2 mi 0
Aug 24, 1986 EF1 74 km 0.5 mi 0
May 21, 1986 EF1 40 km 0.5 mi 0
May 21, 1986 EF1 51 km 5.0 mi 0
Aug 18, 1983 EF1 16 km 2.5 mi 0
Jun 30, 1982 EF1 57 km 1.2 mi 0
Jul 17, 1981 EF1 58 km 0.8 mi 0
May 6, 1981 EF1 78 km 0.5 mi 0
May 26, 1964 EF1 51 km 0.5 mi 0
Mar 13, 1959 EF1 94 km 0.4 mi 0
May 18, 1956 EF1 74 km 0.1 mi 0
Jun 23, 2023 EF0 38 km 0.2 mi 0
Jun 2, 2019 EF0 83 km 1.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).

Year Location Cause Max Wave Deaths Distance
1909 UTAH Earthquake 3.6 m - 95 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Wapi Lava Field (93 km).

Name Type Elevation Last Eruption Distance
Wapi Lava Field Shield 1,604 m (5,262 ft) -300 93 km
Hell's Half Acre Shield 1,631 m (5,351 ft) -3250 107 km
Craters of the Moon Pyroclastic cone(s) 2,005 m (6,578 ft) -130 144 km
Black Butte Crater Lava Field Shield 1,478 m (4,849 ft) -8400 191 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: COFFEE POINT (73,480 acres, 2000).

Year Name Acres Burned Distance
2000 COFFEE POINT 73,480 91 km
2007 BLACK PINE 2 69,897 92 km
2000 FLATTOP 56,792 89 km
2017 POWERLINE 54,378 39 km
2006 STONE 2 50,677 68 km
1994 ELEVATOR 31,854 65 km
2013 STATE 31,011 61 km
1992 SAGEHEN 26,663 59 km
1998 TILDEN 2 23,183 99 km
1999 GRANDVIEW 23,031 91 km
2016 BROAD MOUTH 21,009 78 km
2012 CEDAR BUTTE WSA 20,564 99 km
2012 RIDGE TOP 17,793 68 km
2000 FISHER SPRINGS 17,428 46 km
2000 EAST FALL CREEK 17,131 70 km
2005 ROUND BUTTE 16,856 89 km
1994 HAWLEY 2 16,781 99 km
2007 CLEVELAND 16,172 44 km
2018 GORING 14,538 80 km
2007 COW CANYON 13,447 75 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 23°F (-5°C) 1.8 in Coldest
February 28°F (-2°C) 1.3 in
March 37°F (3°C) 1.2 in
April 45°F (7°C) 1.2 in
May 54°F (12°C) 2.0 in Wettest
June 62°F (16°C) 1.2 in
July 70°F (21°C) 0.6 in Warmest, Driest
August 68°F (20°C) 1.0 in
September 59°F (15°C) 1.2 in
October 47°F (8°C) 1.2 in
November 35°F (2°C) 1.0 in
December 25°F (-4°C) 1.7 in

Arimo has a seasonal temperature swing of 46°F / from 23°F in January to 70°F in July. Total annual precipitation is 15.5 inches, with May being the wettest month (2.0") and July the driest (0.6").

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