Weather & Climate in Gwinn, MI

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

Gwinn has a cool climate with an average annual temperature of 42°F (6°C). Winters average 17°F in January while summers reach 67°F in July. The area gets 249 sunny days per year, above the national average. Annual precipitation totals 32.7 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 1,107 feet.

Temperature

17°F Jan (-8°C) 67°F Jul (20°C)

Annual Average	42.0°F
	22% below US avg
January Average	17°F (-8°C)
July Average	67°F (20°C)
Sunny Days	249 days/yr

Geography

Elevation	1,107 ft (337 m)
Area	5.1 sq mi (13.1 km²)
Population Density	451/sq mi
Coordinates	46.2854°N, 87.4419°W
Timezone	America/Detroit
County	Marquette County County
Nearest Airport	Marquette/Sawyer Regional (MQT) 2 miles away

Precipitation & Snow

Annual Rainfall 32.7"

14% below US avg

Wettest Month (Sep) 3.86"

Driest Month (Feb) 1.30"

Air Quality

AQI Median	38.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	69.8 / 100
Social Vulnerability	53.8 / 100
Community Resilience	88.8 / 100

Hazard Breakdown

Tornado	Very Low
Hurricane	No Rating
Earthquake	Very Low
Wildfire	Relatively Low
Flood	Relatively Low
Hail	Relatively High
Strong Wind	Relatively Moderate
Heat Wave	Very Low
Winter Weather	Relatively High
Lightning	Relatively Moderate
Ice Storm	Relatively Low
Drought	Very Low
Cold Wave	Relatively High
Landslide	Very Low
Coastal Flood	Very Low

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

Earthquake History

1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.5.

Jan 7, 2024	3 km NE of Mole Lake, Wisconsin	M2.5	145 km	5 km

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

Tornado History

55 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 20 injuries.

Date	Rating	Distance	Path	Fatalities
May 28, 1991	EF3	92 km	10.0 mi	0
Jul 11, 1987	EF3	66 km	71.0 mi	0
Jul 4, 1986	EF3	75 km	24.3 mi	0
Jul 19, 1992	EF2	58 km	0.2 mi	0
May 28, 1991	EF2	70 km	12.0 mi	0
Jul 14, 1984	EF2	99 km	27.0 mi	0
Jun 14, 1981	EF2	61 km	2.6 mi	0
Jul 20, 1972	EF2	32 km	0.8 mi	0
Aug 22, 1968	EF2	83 km	0.3 mi	0
May 6, 1964	EF2	34 km	0.1 mi	0
Jul 8, 1959	EF2	71 km	1.0 mi	0
Jun 15, 2022	EF1	73 km	0.7 mi	0
Aug 31, 2020	EF1	65 km	0.6 mi	0
Aug 9, 2020	EF1	67 km	3.8 mi	0
Aug 11, 2016	EF1	67 km	1.3 mi	0
May 24, 2016	EF1	54 km	3.8 mi	0
May 24, 2016	EF1	34 km	3.9 mi	0
Jun 8, 2012	EF1	71 km	7.8 mi	0
Sep 30, 2002	EF1	71 km	5.2 mi	0
Jun 10, 2000	EF1	26 km	7.5 mi	0

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

Wildfire History

11 wildfires (100+ acres) recorded within 100 km. Largest: MARQUETTE9 (4,224 acres, 1999).

Year	Name	Acres Burned	Distance
1999	MARQUETTE9	4,224	48 km
1986	MARQUETTE11	3,983	7 km
1987	EIGHT MILE	3,475	84 km
1986	MARQUETTE13	2,491	7 km
2007	BARAGA BUMP	1,047	95 km
2009	FALLS	820	29 km
2009	PINERY	695	90 km
1986	MARQUETTE10	671	29 km
1984	UNNAMED	575	69 km
2019	DUTCH MILL	551	46 km
1986	MARQUETTE9	521	43 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	17°F (-8°C)	1.8 in
February	17°F (-8°C)	1.3 in	Coldest, Driest
March	26°F (-3°C)	2.1 in
April	38°F (4°C)	2.4 in
May	51°F (11°C)	3.1 in
June	60°F (16°C)	3.4 in
July	67°F (20°C)	3.2 in	Warmest
August	64°F (18°C)	3.6 in
September	56°F (13°C)	3.9 in	Wettest
October	45°F (7°C)	3.1 in
November	32°F (-0°C)	2.6 in
December	20°F (-7°C)	2.0 in

Gwinn has a seasonal temperature swing of 50°F / from 17°F in February to 67°F in July. Total annual precipitation is 32.3 inches, with September being the wettest month (3.9") and February the driest (1.3").

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