Weather & Climate in Harrison, ID

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

Harrison experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 30°F in January while summers reach 67°F in July. The area gets 276 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 28.5 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 2,657 feet.

Temperature

30°F Jan (-1°C) 67°F Jul (19°C)

Annual Average	46.5°F
	14% below US avg
January Average	30°F (-1°C)
July Average	67°F (19°C)
Sunny Days	276 days/yr

Geography

Elevation	2,657 ft (810 m)
Area	0.8 sq mi (2.0 km²)
Population Density	68/sq mi
Coordinates	47.4695°N, 116.8086°W
Timezone	America/Boise
County	Kootenai County County
Nearest Airport	Spokane International (GEG) 35 miles away

Precipitation & Snow

Annual Rainfall 28.5"

25% below US avg

Wettest Month (Jan) 3.66"

Driest Month (Jul) 0.98"

Air Quality

AQI Median	33.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	79.0 / 100
Social Vulnerability	23.4 / 100
Community Resilience	46.6 / 100

Hazard Breakdown

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

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

Earthquake History

94 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.

Dec 22, 1998	Idaho-Montana border region	M4.7	133 km	12 km
Aug 17, 1994	1 km E of Mullan, Idaho	M4.1	78 km	2 km
Jan 20, 1998	15 km SSE of Happys Inn, Montana	M4.0	142 km	7 km
Nov 11, 2001	3 km NE of Spokane, Washington	M4.0	51 km	4 km
Apr 24, 2015	8 km WSW of Hope, Idaho	M3.9	88 km	17 km
Jun 25, 2001	Washington	M3.9	50 km	10 km
Jun 28, 1998	3 km SE of Genesee, Idaho	M3.8	104 km	10 km
Apr 24, 2015	12 km SSW of East Hope, Idaho	M3.7	81 km	9 km
May 30, 1996	3 km SSW of Mullan, Idaho	M3.6	74 km	1 km
Mar 14, 1997	1 km E of Mullan, Idaho	M3.6	77 km	2 km
Jan 20, 2000	21 km ENE of Athol, Idaho	M3.5	66 km	5 km
May 14, 2014	5 km NE of Happys Inn, Montana	M3.4	147 km	15 km
Mar 8, 1994	32 km S of Wallace, Idaho	M3.4	73 km	5 km
Jun 25, 2001	2 km SSE of Town and Country, Washington	M3.4	52 km	10 km
Jun 17, 2004	11 km SSE of Washtucna, Washington	M3.4	140 km	17 km
Nov 2, 1996	4 km W of Trout Creek, Montana	M3.4	96 km	5 km
Jun 28, 1997	3 km NNW of Mullan, Idaho	M3.4	75 km	2 km
Dec 15, 2012	19 km S of Troy, Montana	M3.4	115 km	1 km
Sep 16, 2002	1 km N of Happys Inn, Montana	M3.3	143 km	8 km
May 10, 2000	Idaho-Montana border region	M3.3	77 km	2 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
May 31, 1997	EF2	48 km	5.0 mi	0
Apr 9, 1991	EF2	79 km	1.0 mi	0
Jul 17, 1978	EF2	83 km	0.1 mi	0
Aug 30, 1971	EF2	74 km	0.5 mi	0
May 6, 1957	EF2	29 km	1.5 mi	0
Jun 15, 1954	EF2	43 km	0.5 mi	0
May 31, 1997	EF1	68 km	5.0 mi	0
May 19, 1986	EF1	80 km	2.0 mi	0
Apr 12, 1984	EF1	42 km	1.0 mi	0
Oct 17, 1983	EF1	56 km	0.5 mi	0
Jun 22, 1981	EF1	72 km	0.1 mi	0
Aug 19, 1978	EF1	91 km	1.9 mi	0
May 2, 1973	EF1	84 km	0.1 mi	0
Jun 29, 1970	EF1	76 km	0.1 mi	0
Apr 18, 2024	EF0	60 km	0.0 mi	0
May 6, 2022	EF0	58 km	0.6 mi	0
May 6, 2022	EF0	45 km	2.1 mi	0
Aug 9, 2016	EF0	64 km	0.2 mi	0
Jul 22, 2016	EF0	60 km	0.2 mi	0
Oct 5, 2011	EF0	77 km	0.0 mi	0

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

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 19.8 m (65 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1949	COLUMBIA RIVER VALLEY, WA	Meteorological	19.8 m	—	123 km
2009	COLUMBIA RIVER VALLEY, WA	Meteorological	9.0 m	—	99 km
2009	COLUMBIA RIVER VALLEY, WA	Meteorological	3.6 m	—	112 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: FORD CORKSCREW (16,179 acres, 2021).

Year	Name	Acres Burned	Distance
2021	FORD CORKSCREW	16,179	86 km
2021	DECEITFUL	12,750	66 km
1991	UNNAMED	12,401	80 km
2015	SOUTH BOBTAIL	11,256	79 km
2023	OREGON	10,957	65 km
2023	GRAY	10,096	65 km
2014	WATERMELON HILL	9,321	75 km
2015	LOWER FLAT	9,034	63 km
2022	WAGNER ROAD	8,155	93 km
2016	SPOKANE COMPLEX	6,839	36 km
2015	CHICADEE	5,766	97 km
2017	CUB CREEK	5,683	94 km
1991	UNNAMED	5,297	91 km
2015	NORTH GRIZZLY	5,286	59 km
2018	ANGEL SPRINGS	4,718	98 km
2006	ULM PEAK	4,610	79 km
2023	RIDGE CREEK	4,608	46 km
2018	SURPRISE CREEK	3,746	63 km
2018	RAMPIKE	3,688	78 km
1996	UNNAMED	3,523	66 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	30°F (-1°C)	3.7 in	Wettest
February	33°F (1°C)	2.7 in
March	38°F (4°C)	2.4 in
April	45°F (7°C)	1.9 in
May	52°F (11°C)	2.1 in
June	59°F (15°C)	1.9 in
July	67°F (19°C)	1.0 in	Warmest, Driest
August	66°F (19°C)	1.2 in
September	57°F (14°C)	1.3 in
October	46°F (8°C)	1.8 in
November	36°F (2°C)	3.4 in
December	29°F (-2°C)	3.7 in	Coldest

Harrison has a seasonal temperature swing of 37°F / from 29°F in December to 67°F in July. Total annual precipitation is 27.1 inches, with January being the wettest month (3.7") and July the driest (1.0").

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