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Weather & Climate in Onekama, MI

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

Onekama experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 24°F in January while summers reach 69°F in July. The area gets 270 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 36.3 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 639 feet.

Temperature

24°F Jan (-4°C) 69°F Jul (21°C)
Annual Average47.5°F
12% below US avg
January Average24°F (-4°C)
July Average69°F (21°C)
Sunny Days270 days/yr

Geography

Elevation639 ft (195 m)
Area0.6 sq mi (1.5 km²)
Population Density547/sq mi
Coordinates44.3656°N, 86.2021°W
TimezoneAmerica/Detroit
CountyManistee County County
Nearest AirportGaylord Regional (GLR)
86 miles away

Precipitation & Snow

Annual Rainfall 36.3"
4% below US avg
Wettest Month (Sep) 4.13"
Driest Month (Feb) 1.61"

Air Quality

AQI Median38.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score37.2 / 100
Social Vulnerability74.7 / 100
Community Resilience98.0 / 100

Hazard Breakdown

Tornado Very Low
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Relatively Low
Hail Very Low
Strong Wind Relatively Low
Heat Wave Very Low
Winter Weather Relatively High
Lightning Relatively Moderate
Ice Storm Very Low
Drought No Rating
Cold Wave Relatively Low
Landslide Relatively 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: M2.9.

Aug 2, 2024 38 km ESE of Sturgeon Bay, Wisconsin M2.9 68 km 11 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

70 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 3 fatalities, 76 injuries.

Date Rating Distance Path Fatalities
Apr 3, 1956 EF4 5 km 50.3 mi 1
Jun 26, 1969 EF3 60 km 6.4 mi 0
Apr 23, 1968 EF3 94 km 60.9 mi 0
Oct 18, 2007 EF2 84 km 4.5 mi 1
May 28, 1991 EF2 78 km 3.0 mi 0
Mar 27, 1991 EF2 92 km 4.0 mi 0
Jun 8, 1985 EF2 69 km 24.0 mi 0
Aug 15, 1978 EF2 94 km 0.8 mi 0
Jul 23, 1976 EF2 79 km 3.3 mi 0
Jun 9, 1974 EF2 94 km 1.5 mi 0
Jun 7, 1974 EF2 60 km 1.2 mi 0
Apr 12, 1972 EF2 61 km 0.1 mi 0
Sep 3, 1964 EF2 80 km 0.1 mi 0
May 8, 1964 EF2 80 km 16.6 mi 0
Jul 31, 1963 EF2 64 km 19.6 mi 0
Sep 13, 1961 EF2 72 km 14.4 mi 0
Sep 26, 1951 EF2 70 km 2.3 mi 1
Aug 28, 2018 EF1 61 km 1.0 mi 0
Jun 12, 2008 EF1 35 km 1.3 mi 0
Jun 8, 2008 EF1 83 km 5.3 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

10 wildfires (100+ acres) recorded within 100 km. Largest: GRANT RX (2,204 acres, 2017).

Year Name Acres Burned Distance
2017 GRANT RX 2,204 33 km
2021 21-SLBE LASSO LOOP BURN 1,906 42 km
2018 SER 438 / WHITE RIVER 814 96 km
2003 WARFIELD ROAD 800 32 km
2019 UNNAMED 793 96 km
1994 COUNTY LINE 735 64 km
2019 BALDWIN FUELS UNITS 1/2/6AB 619 59 km
2019 19-SLBE PETERSON 605 41 km
2021 WARFIELD 538 32 km
2024 WHELAN LAKE BLOCK 1 PARTIAL 1 RX 512 51 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-4°C) 2.3 in Coldest
February 25°F (-4°C) 1.6 in Driest
March 31°F (-0°C) 2.0 in
April 42°F (5°C) 2.6 in
May 53°F (11°C) 2.5 in
June 62°F (17°C) 3.3 in
July 69°F (21°C) 2.6 in Warmest
August 67°F (20°C) 3.4 in
September 61°F (16°C) 4.1 in Wettest
October 50°F (10°C) 3.1 in
November 39°F (4°C) 2.8 in
December 29°F (-2°C) 2.5 in

Onekama has a seasonal temperature swing of 45°F / from 24°F in January to 69°F in July. Total annual precipitation is 33.0 inches, with September being the wettest month (4.1") and February the driest (1.6").

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