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Weather & Climate in Mass City, MI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mass City has a cool climate with an average annual temperature of 43°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 32.9 inches. The area receives 177.7 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 1,040 feet.
Temperature
17°F Jan (-8°C)
67°F Jul (20°C)
| Annual Average | 43.3°F |
| 20% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 249 days/yr |
Geography
| Elevation | 1,040 ft (317 m) |
| Area | 0.5 sq mi (1.4 km²) |
| Population Density | 374/sq mi |
| Coordinates | 46.7616°N, 89.0849°W |
| Timezone | America/Detroit |
| County | Ontonagon County County |
| Nearest Airport | Marquette/Sawyer Regional (MQT) 86 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 4.2 / 100 |
| Social Vulnerability | 66.2 / 100 |
| Community Resilience | 67.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | No Rating |
| Earthquake | No Rating |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| 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 | 140 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
36 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 2 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 7, 1970 | EF3 | 89 km | 37.9 mi | 0 |
| Aug 22, 1968 | EF2 | 55 km | 0.3 mi | 0 |
| Aug 9, 2020 | EF1 | 98 km | 5.9 mi | 0 |
| Aug 9, 2020 | EF1 | 91 km | 4.6 mi | 0 |
| Aug 9, 2020 | EF1 | 87 km | 6.2 mi | 0 |
| Jul 11, 2016 | EF1 | 83 km | 2.4 mi | 0 |
| Jul 11, 2016 | EF1 | 93 km | 2.3 mi | 0 |
| May 24, 2016 | EF1 | 82 km | 3.8 mi | 0 |
| Jun 8, 2012 | EF1 | 80 km | 7.8 mi | 0 |
| Jun 5, 2005 | EF1 | 49 km | 0.3 mi | 0 |
| Jul 14, 1995 | EF1 | 77 km | 3.5 mi | 0 |
| Apr 26, 1994 | EF1 | 78 km | 4.5 mi | 0 |
| Aug 1, 1988 | EF1 | 99 km | 1.0 mi | 0 |
| Jul 29, 1988 | EF1 | 94 km | 0.2 mi | 0 |
| Jul 24, 1986 | EF1 | 100 km | 0.2 mi | 0 |
| Apr 27, 1984 | EF1 | 91 km | 0.2 mi | 0 |
| Jul 3, 1983 | EF1 | 94 km | 0.5 mi | 0 |
| Jun 13, 1981 | EF1 | 89 km | 0.1 mi | 0 |
| Aug 15, 1978 | EF1 | 84 km | 0.5 mi | 0 |
| Aug 19, 1973 | EF1 | 94 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: MARQUETTE9 (4,224 acres, 1999).
| Year | Name | Acres Burned | Distance |
| 1999 | MARQUETTE9 | 4,224 | 89 km |
| 2007 | BARAGA BUMP | 1,047 | 42 km |
| 2009 | PINERY | 695 | 53 km |
| 1986 | MARQUETTE9 | 521 | 94 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.0 in | |
| February | 15°F (-9°C) | 1.3 in | Coldest, Driest |
| March | 26°F (-4°C) | 1.9 in | |
| April | 39°F (4°C) | 2.1 in | |
| May | 52°F (11°C) | 3.3 in | |
| June | 60°F (16°C) | 3.5 in | |
| July | 67°F (20°C) | 3.2 in | Warmest |
| August | 64°F (18°C) | 3.7 in | Wettest |
| September | 56°F (13°C) | 3.6 in | |
| October | 45°F (7°C) | 3.1 in | |
| November | 31°F (-0°C) | 2.6 in | |
| December | 19°F (-7°C) | 2.2 in |
Mass City has a seasonal temperature swing of 52°F / from 15°F in February to 67°F in July. Total annual precipitation is 32.3 inches, with August being the wettest month (3.7") and February the driest (1.3").