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Weather & Climate in American Falls, ID

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

American Falls experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 27°F in January while summers reach 73°F in July. The area gets 302 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 11.1 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 4,414 feet.

Temperature

27°F Jan (-3°C) 73°F Jul (23°C)
Annual Average48.7°F
10% below US avg
January Average27°F (-3°C)
July Average73°F (23°C)
Sunny Days302 days/yr

Geography

Elevation4,414 ft (1,345 m)
Area1.6 sq mi (4.2 km²)
Population Density2,880/sq mi
Coordinates42.7828°N, 112.8542°W
TimezoneAmerica/Boise
CountyPower County County
Nearest AirportPocatello Regional (PIH)
16 miles away

Precipitation & Snow

Annual Rainfall 11.1"
71% below US avg
Wettest Month (May) 1.38"
Driest Month (Aug) 0.67"

Air Quality

AQI Median33.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score16.9 / 100
Social Vulnerability25.1 / 100
Community Resilience2.1 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Very Low
Wildfire Relatively Moderate
Flood Very Low
Hail Very Low
Strong Wind Very Low
Heat Wave Relatively Low
Winter Weather Relatively Moderate
Lightning Very Low
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

1,095 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.

Sep 2, 2017 12 km E of Soda Springs, Idaho M5.3 116 km 10 km
Apr 21, 2001 29 km WSW of Freedom, Idaho M5.3 120 km 1 km
Sep 10, 2017 9 km NNW of Georgetown, Idaho M5.0 120 km 10 km
Feb 4, 1994 4 km WNW of Fairview, Wyoming M4.7 150 km 5 km
Sep 11, 2017 9 km NW of Georgetown, Idaho M4.7 119 km 8 km
Sep 10, 2017 12 km ESE of Soda Springs, Idaho M4.7 115 km 5 km
Sep 3, 2017 15 km ESE of Soda Springs, Idaho M4.7 118 km 10 km
Sep 3, 2017 10 km E of Soda Springs, Idaho M4.7 114 km 8 km
Nov 4, 1992 67 km ENE of Montello, Nevada M4.7 149 km 9 km
Sep 6, 2017 11 km NNW of Georgetown, Idaho M4.6 118 km 10 km
Sep 4, 2017 13 km ESE of Soda Springs, Idaho M4.5 116 km 6 km
Nov 10, 1992 32 km WNW of Freedom, Idaho M4.4 122 km 10 km
Feb 3, 1994 13 km WSW of Auburn, Wyoming M4.4 140 km 5 km
Feb 3, 1994 2 km SW of Auburn, Wyoming M4.4 150 km 5 km
Feb 10, 1994 3 km WSW of Auburn, Wyoming M4.4 147 km 5 km
Jan 26, 2018 5 km NNW of Georgetown, Idaho M4.4 123 km 10 km
May 5, 2024 16 km SW of Thatcher, Utah M4.4 139 km 7 km
Sep 5, 2017 13 km NNW of Georgetown, Idaho M4.3 118 km 6 km
Sep 11, 2017 9 km NNW of Georgetown, Idaho M4.3 119 km 2 km
Sep 5, 2017 12 km NNW of Georgetown, Idaho M4.3 117 km 3 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
May 18, 1991 EF2 69 km 0.2 mi 0
Aug 17, 1990 EF2 2 km 4.0 mi 0
Sep 11, 1968 EF2 86 km 0.5 mi 0
May 31, 2018 EF1 77 km 12.0 mi 0
Feb 14, 2000 EF1 87 km 12.0 mi 0
Feb 14, 2000 EF1 45 km 14.0 mi 0
Feb 14, 2000 EF1 78 km 9.0 mi 0
Jul 20, 1999 EF1 21 km 2.5 mi 0
Jun 11, 1993 EF1 39 km 10.0 mi 0
Jul 18, 1987 EF1 94 km 1.0 mi 0
Aug 24, 1986 EF1 14 km 0.5 mi 0
May 21, 1986 EF1 85 km 5.0 mi 0
Aug 18, 1983 EF1 48 km 2.5 mi 0
Jul 17, 1981 EF1 23 km 0.8 mi 0
Jul 27, 1972 EF1 96 km 1.0 mi 0
Jun 7, 1972 EF1 69 km 0.5 mi 0
May 26, 1964 EF1 25 km 0.5 mi 0
Mar 13, 1959 EF1 92 km 0.4 mi 0
May 18, 1956 EF1 59 km 0.1 mi 0
Jun 23, 2023 EF0 94 km 0.2 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 — 110 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Wapi Lava Field (32 km).

Name Type Elevation Last Eruption Distance
Wapi Lava Field Shield 1,604 m (5,262 ft) -300 32 km
Hell's Half Acre Shield 1,631 m (5,351 ft) -3250 86 km
Craters of the Moon Pyroclastic cone(s) 2,005 m (6,578 ft) -130 88 km
Black Butte Crater Lava Field Shield 1,478 m (4,849 ft) -8400 130 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: COXS WELL (219,424 acres, 1996).

Year Name Acres Burned Distance
1996 COXS WELL 219,424 49 km
2006 CRYSTAL 218,581 43 km
1996 RICHFIELDS 178,385 93 km
1992 BLACK RIDGE 147,833 86 km
1999 MULE BUTTE 138,102 45 km
2019 SHEEP 107,233 94 km
2012 FLAT TOP 2 102,340 88 km
2000 COFFEE POINT 73,480 49 km
2007 BLACK PINE 2 69,897 68 km
2000 FLATTOP 56,792 30 km
2017 POWERLINE 54,378 22 km
2006 STONE 2 50,677 72 km
1999 CEDAR BUTTE 49,625 65 km
2005 RUPERT 45,361 57 km
2016 LAIDLAW 40,551 78 km
2000 COFFEE POINT NORTH 35,980 88 km
2008 NORTH MINIDOKA 32,363 52 km
1994 ELEVATOR 31,854 97 km
2012 SHALE BUTTE 31,479 70 km
2013 STATE 31,011 94 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 27°F (-3°C) 0.9 in
February 29°F (-2°C) 0.8 in
March 37°F (3°C) 1.0 in
April 45°F (7°C) 0.9 in
May 53°F (12°C) 1.4 in Wettest
June 62°F (17°C) 1.2 in
July 73°F (23°C) 0.7 in Warmest
August 70°F (21°C) 0.7 in Driest
September 60°F (16°C) 0.8 in
October 49°F (9°C) 0.9 in
November 36°F (2°C) 0.9 in
December 26°F (-3°C) 0.9 in Coldest

American Falls has a seasonal temperature swing of 47°F / from 26°F in December to 73°F in July. Total annual precipitation is 11.0 inches, with May being the wettest month (1.4") and August the driest (0.7").

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