Weather & Climate in Boise City, ID

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

Boise City experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 33°F in January while summers reach 81°F in July. The area gets 301 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 15.3 inches (drier than the 38-inch national average). The area receives 28.9 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 48. 52% of days have good air quality. The city sits at an elevation of 2,743 feet.

Temperature

33°F Jan (1°C) 81°F Jul (27°C)

Annual Average	53.3°F
	1% below US avg
January Average	33°F (1°C)
July Average	81°F (27°C)
Sunny Days	301 days/yr

Geography

Elevation	2,743 ft (836 m)
Area	83,673.6 sq mi (216,714.6 km²)
Population Density	2,768/sq mi
Coordinates	43.6002°N, 116.2317°W
Timezone	America/Boise
County	Ada County County
Nearest Airport	Boise Air Trml/Gowen Field (BOI) 3 miles away

Precipitation & Snow

Annual Rainfall 15.3"

60% below US avg

Snowfall 28.9"

Wettest Month (Jan) 1.54"

Driest Month (Jul) 0.35"

Air Quality

AQI Median	48.0
Rating	Good
Good Days %	51.6%
Unhealthy Days	49

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	87.8 / 100
Social Vulnerability	10.6 / 100
Community Resilience	92.2 / 100

Hazard Breakdown

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

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

Earthquake History

1,296 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.5.

Mar 31, 2020	Stanley, Idaho	M6.5	131 km	12 km
Feb 26, 2024	10 km N of Smiths Ferry, Idaho	M4.9	88 km	12 km
Apr 1, 2020	21 km WNW of Stanley, Idaho	M4.8	117 km	10 km
Jun 25, 2020	27 km NW of Stanley, Idaho	M4.6	122 km	8 km
May 14, 2020	31 km NW of Stanley, Idaho	M4.4	122 km	13 km
Apr 1, 2020	23 km NW of Stanley, Idaho	M4.4	119 km	7 km
May 21, 2020	26 km NW of Stanley, Idaho	M4.4	123 km	6 km
Jun 9, 2020	11 km NW of Stanley, Idaho	M4.2	123 km	10 km
Apr 11, 1995	20 km SSE of Yellow Pine, Idaho	M4.2	146 km	5 km
Jun 14, 2020	10 km NW of Stanley, Idaho	M4.2	121 km	8 km
Apr 11, 2020	20 km NW of Stanley, Idaho	M4.1	119 km	10 km
Jul 10, 2020	18 km SW of Stanley, Idaho	M4.1	107 km	10 km
Apr 21, 2020	29 km NW of Stanley, Idaho	M4.1	124 km	10 km
Apr 1, 2020	18 km NW of Stanley, Idaho	M4.0	120 km	14 km
Jun 3, 2025	15 km NNW of Stanley, Idaho	M4.0	128 km	14 km
Oct 27, 1994	11 km SE of Halfway, Oregon	M4.0	148 km	10 km
Jun 3, 2025	17 km NNW of Stanley, Idaho	M4.0	128 km	10 km
Apr 3, 2020	20 km NW of Stanley, Idaho	M4.0	118 km	10 km
Apr 3, 2020	26 km NW of Stanley, Idaho	M3.9	119 km	15 km
Jun 17, 2020	southern Idaho	M3.9	123 km	13 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Apr 30, 1997	EF1	86 km	3.0 mi	0
May 17, 1996	EF1	70 km	0.3 mi	0
May 17, 1996	EF1	93 km	5.5 mi	0
Jun 19, 1991	EF1	37 km	0.1 mi	0
Oct 26, 1984	EF1	12 km	0.3 mi	0
Mar 21, 1984	EF1	17 km	0.1 mi	0
Jul 1, 1983	EF1	68 km	2.0 mi	0
Apr 23, 1974	EF1	72 km	1.0 mi	0
Jun 23, 1969	EF1	98 km	1.0 mi	0
Aug 25, 1966	EF1	71 km	19.1 mi	0
Jun 2, 1961	EF1	82 km	0.1 mi	0
Jul 9, 1956	EF1	24 km	0.1 mi	0
May 27, 2023	EF0	74 km	5.0 mi	0
May 26, 2023	EF0	23 km	1.0 mi	0
May 27, 2022	EF0	47 km	3.8 mi	0
May 27, 2019	EF0	85 km	0.5 mi	0
May 26, 2013	EF0	54 km	3.9 mi	0
Aug 25, 2004	EF0	46 km	—	0
Aug 25, 2004	EF0	39 km	—	0
Apr 6, 2003	EF0	27 km	1.0 mi	0

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

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Jordan Craters (111 km).

Name	Type	Elevation	Last Eruption	Distance
Jordan Craters	Volcanic field	1,473 m (4,833 ft)	-1250	111 km
Black Butte Crater Lava Field	Shield	1,478 m (4,849 ft)	-8400	159 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	60 km
1992	FOOTHILLS	228,631	43 km
2016	PIONEER	189,596	79 km
2024	PADDOCK	186,842	63 km
1994	IDAHO CITY COMPLEX (RABBIT CREEK)	150,456	75 km
2013	PONY COMPLEX	148,188	53 km
2012	TRINITY RIDGE	141,807	69 km
2013	ELK COMPLEX	129,565	62 km
2000	JACKSON	80,733	98 km
2006	CHERRY	56,773	56 km
2006	RATTLESNAKE COMPLEX	48,330	84 km
2013	OWYHEE	48,001	77 km
1989	SMOKEY CREEK	47,682	79 km
1984	BIG DRAW 2	45,805	97 km
2002	TRIMBLY CREEK	43,085	67 km
1986	BISSELL CK	40,847	54 km
1986	VAN DUSEN	39,901	51 km
2017	LOVERIDGE	39,630	98 km
2008	SOUTH BARKER WFU	36,091	89 km
2016	CHERRY ROAD	35,219	81 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	33°F (1°C)	1.5 in	Wettest
February	36°F (2°C)	1.2 in
March	43°F (6°C)	1.4 in
April	49°F (10°C)	1.2 in
May	58°F (14°C)	1.2 in
June	66°F (19°C)	0.8 in
July	81°F (27°C)	0.4 in	Warmest, Driest
August	73°F (23°C)	0.4 in
September	63°F (17°C)	0.8 in
October	52°F (11°C)	0.8 in
November	40°F (4°C)	1.5 in
December	31°F (-0°C)	1.5 in	Coldest

Boise City has a seasonal temperature swing of 50°F / from 31°F in December to 81°F in July. Total annual precipitation is 12.5 inches, with January being the wettest month (1.5") and July the driest (0.4").

View full profile of Boise City, ID →