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 Average	48.7°F
	10% below US avg
January Average	27°F (-3°C)
July Average	73°F (23°C)
Sunny Days	302 days/yr

Geography

Elevation	4,414 ft (1,345 m)
Area	1.6 sq mi (4.2 km²)
Population Density	2,880/sq mi
Coordinates	42.7828°N, 112.8542°W
Timezone	America/Boise
County	Power County County
Nearest Airport	Pocatello 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 Median	33.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	16.9 / 100
Social Vulnerability	25.1 / 100
Community Resilience	2.1 / 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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