Weather & Climate in Letha, ID

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

Letha experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 75°F in July. The area gets 310 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 10.0 inches (drier than the 38-inch national average). The area receives 11.5 inches of snow annually. Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 2,285 feet.

Temperature

30°F Jan (-1°C) 75°F Jul (24°C)

Annual Average	51.5°F
	5% below US avg
January Average	30°F (-1°C)
July Average	75°F (24°C)
Sunny Days	310 days/yr

Geography

Elevation	2,285 ft (696 m)
Area	0.5 sq mi (1.2 km²)
Population Density	1,258/sq mi
Coordinates	43.8928°N, 116.6470°W
Timezone	America/Boise
County	Canyon County County
Nearest Airport	Boise Air Trml/Gowen Field (BOI) 31 miles away

Precipitation & Snow

Annual Rainfall 10.0"

74% below US avg

Snowfall 11.5"

Wettest Month (Jan) 1.81"

Driest Month (Jul) 0.31"

Air Quality

AQI Median	33.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	71.7 / 100
Social Vulnerability	18.5 / 100
Community Resilience	42.4 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Low
Wildfire	Relatively Moderate
Flood	Relatively Moderate
Hail	Relatively Low
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Very High
Lightning	Relatively High
Ice Storm	Relatively Moderate
Drought	Very Low
Cold Wave	Relatively Low
Landslide	Very Low
Volcano	Very Low
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

1,265 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.5.

Mar 31, 2020	Stanley, Idaho	M6.5	138 km	12 km
Feb 26, 2024	10 km N of Smiths Ferry, Idaho	M4.9	70 km	12 km
Apr 1, 2020	21 km WNW of Stanley, Idaho	M4.8	128 km	10 km
Jun 25, 2020	27 km NW of Stanley, Idaho	M4.6	130 km	8 km
May 21, 2020	26 km NW of Stanley, Idaho	M4.4	131 km	6 km
May 14, 2020	31 km NW of Stanley, Idaho	M4.4	128 km	13 km
Apr 1, 2020	23 km NW of Stanley, Idaho	M4.4	128 km	7 km
Jun 9, 2020	11 km NW of Stanley, Idaho	M4.2	137 km	10 km
Jun 14, 2020	10 km NW of Stanley, Idaho	M4.2	135 km	8 km
Apr 11, 1995	20 km SSE of Yellow Pine, Idaho	M4.2	139 km	5 km
Apr 11, 2020	20 km NW of Stanley, Idaho	M4.1	129 km	10 km
Jul 10, 2020	18 km SW of Stanley, Idaho	M4.1	127 km	10 km
Apr 21, 2020	29 km NW of Stanley, Idaho	M4.1	130 km	10 km
Apr 3, 2020	20 km NW of Stanley, Idaho	M4.0	129 km	10 km
Oct 27, 1994	11 km SE of Halfway, Oregon	M4.0	106 km	10 km
Jun 3, 2025	17 km NNW of Stanley, Idaho	M4.0	139 km	10 km
Apr 1, 2020	18 km NW of Stanley, Idaho	M4.0	131 km	14 km
Jun 3, 2025	15 km NNW of Stanley, Idaho	M4.0	140 km	14 km
Jul 10, 2020	14 km SW of Stanley, Idaho	M3.9	129 km	14 km
Apr 3, 2020	26 km NW of Stanley, Idaho	M3.9	127 km	15 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

39 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.

Date	Rating	Distance	Path	Fatalities
Apr 30, 1997	EF1	43 km	3.0 mi	0
May 17, 1996	EF1	47 km	5.5 mi	0
May 17, 1996	EF1	36 km	0.3 mi	0
Jun 19, 1991	EF1	12 km	0.1 mi	0
Jul 9, 1990	EF1	55 km	0.1 mi	0
Oct 26, 1984	EF1	42 km	0.3 mi	0
Mar 21, 1984	EF1	51 km	0.1 mi	0
Jul 1, 1983	EF1	22 km	2.0 mi	0
Apr 23, 1974	EF1	39 km	1.0 mi	0
Aug 25, 1966	EF1	37 km	19.1 mi	0
Jun 27, 1958	EF1	86 km	5.0 mi	0
Jul 9, 1956	EF1	25 km	0.1 mi	0
May 26, 2023	EF0	25 km	1.0 mi	0
May 27, 2022	EF0	54 km	3.8 mi	0
May 26, 2013	EF0	100 km	3.9 mi	0
Aug 25, 2004	EF0	18 km	—	0
Aug 25, 2004	EF0	3 km	—	0
Apr 6, 2003	EF0	35 km	1.0 mi	0
Sep 29, 2002	EF0	5 km	1.0 mi	0
Feb 7, 2002	EF0	12 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Jordan Craters (106 km).

Name	Type	Elevation	Last Eruption	Distance
Jordan Craters	Volcanic field	1,473 m (4,833 ft)	-1250	106 km
Diamond Craters	Volcanic field	1,435 m (4,708 ft)	-5610	191 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: SODA (282,888 acres, 2015).

Year	Name	Acres Burned	Distance
2015	SODA	282,888	66 km
1992	FOOTHILLS	228,631	86 km
2016	PIONEER	189,596	89 km
2024	PADDOCK	186,842	29 km
1994	IDAHO CITY COMPLEX (RABBIT CREEK)	150,456	99 km
2013	PONY COMPLEX	148,188	98 km
2024	COW VALLEY	134,642	83 km
2020	WOODHEAD	98,995	96 km
2000	JACKSON	80,733	52 km
2006	CHERRY	56,773	30 km
2006	RATTLESNAKE COMPLEX	48,330	82 km
2013	OWYHEE	48,001	52 km
1989	SMOKEY CREEK	47,682	93 km
2002	TRIMBLY CREEK	43,085	57 km
1986	BISSELL CK	40,847	12 km
1986	VAN DUSEN	39,901	23 km
2022	WILLOW CREEK	38,585	58 km
2016	CHERRY ROAD	35,219	59 km
2018	MESA	34,541	89 km
2002	MAHOGANY COMPLEX (ATKINS BUTTE)	33,472	75 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	30°F (-1°C)	1.8 in	Wettest
February	35°F (2°C)	1.5 in
March	43°F (6°C)	1.4 in
April	50°F (10°C)	1.1 in
May	58°F (14°C)	1.0 in
June	66°F (19°C)	0.9 in
July	75°F (24°C)	0.3 in	Warmest, Driest
August	73°F (23°C)	0.5 in
September	63°F (17°C)	0.8 in
October	52°F (11°C)	0.9 in
November	39°F (4°C)	1.8 in
December	30°F (-1°C)	1.8 in	Coldest

Letha has a seasonal temperature swing of 45°F / from 30°F in December to 75°F in July. Total annual precipitation is 13.7 inches, with January being the wettest month (1.8") and July the driest (0.3").

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