Weather & Climate in Island Park, ID

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

Island Park has a cool climate with an average annual temperature of 35°F (2°C). Winters average 14°F in January while summers reach 59°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 26.0 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 6,431 feet.

Temperature

14°F Jan (-10°C) 59°F Jul (15°C)

Annual Average	35.2°F
	35% below US avg
January Average	14°F (-10°C)
July Average	59°F (15°C)
Sunny Days	276 days/yr

Geography

Elevation	6,431 ft (1,960 m)
Area	6.2 sq mi (16.0 km²)
Population Density	28/sq mi
Coordinates	44.5342°N, 111.3378°W
Timezone	America/Boise
County	Fremont County County
Nearest Airport	Jackson Hole (JAC) 71 miles away

Precipitation & Snow

Annual Rainfall 26.0"

32% below US avg

Wettest Month (Jan) 3.27"

Driest Month (Jul) 1.38"

Air Quality

AQI Median	33.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	38.3 / 100
Social Vulnerability	10.6 / 100
Community Resilience	17.8 / 100

Hazard Breakdown

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

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

Earthquake History

1,192 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.

Jul 26, 2005	16 km N of Dillon, Montana	M5.6	137 km	13 km
Aug 20, 1999	22 km NW of Lima, Montana	M5.1	118 km	16 km
Jan 7, 2004	20 km ESE of Kelly, Wyoming	M5.0	132 km	3 km
Mar 30, 2014	22 km S of Mammoth, Wyoming	M4.8	58 km	6 km
Aug 5, 2010	19 km E of Kelly, Wyoming	M4.8	129 km	5 km
Apr 9, 2019	9 km NE of Lima, Montana	M4.6	94 km	14 km
Apr 5, 2011	28 km NNE of Spencer, Idaho	M4.4	60 km	12 km
Feb 5, 2006	44 km NE of Spencer, Idaho	M4.4	46 km	14 km
Jun 20, 1998	8 km E of Hoback, Wyoming	M4.4	149 km	0 km
May 8, 2007	8 km NNW of Alder, Montana	M4.4	114 km	14 km
Jun 16, 2017	12 km E of Hebgen Lake Estates, Montana	M4.4	37 km	9 km
Jun 13, 2016	45 km W of Hebgen Lake Estates, Montana	M4.3	40 km	10 km
Aug 21, 2003	53 km N of Kelly, Wyoming	M4.3	82 km	6 km
Oct 28, 1998	18 km S of Whitehall, Montana	M4.3	144 km	5 km
May 11, 2022	36 km S of Silver Gate, Montana	M4.2	107 km	14 km
Nov 24, 2000	24 km S of Mammoth, Wyoming	M4.2	56 km	9 km
Aug 23, 1998	9 km N of Alta, Wyoming	M4.2	81 km	5 km
Aug 5, 2010	19 km E of Kelly, Wyoming	M4.2	125 km	5 km
Jul 14, 2023	3 km S of Lima, Montana	M4.2	100 km	12 km
Aug 28, 1995	62 km NNE of Kelly, Wyoming	M4.2	92 km	8 km

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

Tornado History

20 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date	Rating	Distance	Path	Fatalities
Sep 26, 1959	EF2	84 km	1.0 mi	0
Mar 25, 1991	EF1	82 km	1.0 mi	0
Apr 11, 1985	EF1	85 km	0.1 mi	0
May 15, 1984	EF1	85 km	8.0 mi	0
Aug 25, 1955	EF1	90 km	0.5 mi	0
Aug 6, 2023	EF0	86 km	1.6 mi	0
Sep 17, 2013	EF0	58 km	0.5 mi	0
Sep 17, 2013	EF0	77 km	0.5 mi	0
Jul 2, 2004	EF0	60 km	0.2 mi	0
Jun 29, 1999	EF0	83 km	0.2 mi	0
Jun 5, 1995	EF0	79 km	0.1 mi	0
Jul 6, 1993	EF0	40 km	0.1 mi	0
Jun 15, 1993	EF0	98 km	0.1 mi	0
Jun 15, 1993	EF0	89 km	0.1 mi	0
Apr 27, 1987	EF0	88 km	0.2 mi	0
Aug 9, 1986	EF0	77 km	0.5 mi	0
Jul 22, 1973	EF0	82 km	0.1 mi	0
Jun 21, 1964	EF0	81 km	0.1 mi	0
Sep 21, 1962	EF0	100 km	0.1 mi	0
Jun 9, 1954	EF0	75 km	0.3 mi	0

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

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Yellowstone (54 km).

Name	Type	Elevation	Last Eruption	Distance
Yellowstone	Caldera(s)	2,805 m (9,203 ft)	-1350	54 km
Hell's Half Acre	Shield	1,631 m (5,351 ft)	-3250	145 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: NORTH FORK (563,527 acres, 1988).

Year	Name	Acres Burned	Distance
1988	NORTH FORK	563,527	52 km
1988	HUCK	123,437	86 km
2018	GRASSY RIDGE	106,164	69 km
2016	MAPLE	103,193	36 km
1988	SNAKE	95,233	77 km
2003	DEEP	38,701	97 km
1988	SHOSHONE	29,941	66 km
1988	REDSHOSHONE COMPLEX	27,443	70 km
1988	RED	21,341	66 km
2016	BERRY	20,783	73 km
1988	FAN	20,422	59 km
2017	DEER PARK	17,745	94 km
2007	COLUMBINE 1	17,290	98 km
2003	EAST	17,226	90 km
1988	FALLS	16,607	63 km
2016	BUFFALO	13,706	96 km
2006	BIG CREEK	13,424	100 km
2018	INDIAN BUTTE	12,897	81 km
2013	MINER PARADISE COMPLEX	12,210	95 km
2006	SNOWSHOE	11,910	67 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	14°F (-10°C)	3.3 in	Coldest, Wettest
February	17°F (-8°C)	2.5 in
March	23°F (-5°C)	2.4 in
April	32°F (-0°C)	1.8 in
May	42°F (5°C)	2.3 in
June	50°F (10°C)	2.4 in
July	59°F (15°C)	1.4 in	Warmest, Driest
August	57°F (14°C)	1.5 in
September	49°F (9°C)	1.6 in
October	39°F (4°C)	1.6 in
November	25°F (-4°C)	2.7 in
December	15°F (-9°C)	3.2 in

Island Park has a seasonal temperature swing of 46°F / from 14°F in January to 59°F in July. Total annual precipitation is 26.6 inches, with January being the wettest month (3.3") and July the driest (1.4").

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