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Weather & Climate in Hemlock, MI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hemlock experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 23°F in January while summers reach 71°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 34.5 inches. The area receives 38.3 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 654 feet.
Temperature
23°F Jan (-5°C)
71°F Jul (22°C)
| Annual Average | 47.6°F |
| 12% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 654 ft (199 m) |
| Area | 2.8 sq mi (7.1 km²) |
| Population Density | 481/sq mi |
| Coordinates | 43.4216°N, 84.2399°W |
| Timezone | America/Detroit |
| County | Saginaw County County |
| Nearest Airport | Mbs International (MBS) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.6 / 100 |
| Social Vulnerability | 46.9 / 100 |
| Community Resilience | 93.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Very High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively High |
| Landslide | 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: M3.5.
| Sep 2, 1994 | 5 km SSW of DeWitt, Michigan | M3.5 | 75 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
318 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 130 fatalities, 1,118 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 8, 1953 | EF5 | 48 km | 18.9 mi | 116 |
| Apr 21, 1967 | EF4 | 71 km | 12.0 mi | 0 |
| Apr 11, 1965 | EF4 | 72 km | 21.0 mi | 1 |
| May 12, 1956 | EF4 | 65 km | 6.6 mi | 3 |
| Jun 8, 1953 | EF4 | 91 km | 33.8 mi | 0 |
| Jul 2, 1997 | EF3 | 51 km | 2.0 mi | 0 |
| Jul 2, 1997 | EF3 | 57 km | 1.7 mi | 1 |
| Jun 21, 1996 | EF3 | 41 km | 1.0 mi | 0 |
| Aug 8, 1984 | EF3 | 64 km | 0.8 mi | 0 |
| Jun 12, 1984 | EF3 | 31 km | 48.0 mi | 0 |
| Mar 30, 1976 | EF3 | 98 km | 6.4 mi | 1 |
| Mar 30, 1976 | EF3 | 79 km | 11.4 mi | 0 |
| Jul 14, 1974 | EF3 | 70 km | 1.0 mi | 0 |
| Feb 28, 2024 | EF2 | 72 km | 5.7 mi | 0 |
| Aug 24, 2023 | EF2 | 86 km | 12.0 mi | 2 |
| Mar 14, 2019 | EF2 | 65 km | 18.2 mi | 0 |
| Jun 22, 2015 | EF2 | 44 km | 11.3 mi | 0 |
| May 28, 2013 | EF2 | 80 km | 4.6 mi | 0 |
| May 28, 2013 | EF2 | 74 km | 5.1 mi | 0 |
| Mar 15, 2012 | EF2 | 73 km | 4.6 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: ROSCOMMON4 (2,109 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | ROSCOMMON4 | 2,109 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.5 in | Coldest |
| February | 23°F (-5°C) | 1.2 in | Driest |
| March | 33°F (0°C) | 2.2 in | |
| April | 45°F (7°C) | 2.7 in | |
| May | 57°F (14°C) | 2.8 in | |
| June | 66°F (19°C) | 3.1 in | |
| July | 71°F (22°C) | 2.5 in | Warmest |
| August | 68°F (20°C) | 3.5 in | |
| September | 61°F (16°C) | 3.9 in | Wettest |
| October | 49°F (10°C) | 2.6 in | |
| November | 38°F (3°C) | 2.6 in | |
| December | 27°F (-3°C) | 2.0 in |
Hemlock has a seasonal temperature swing of 48°F / from 23°F in January to 71°F in July. Total annual precipitation is 30.7 inches, with September being the wettest month (3.9") and February the driest (1.2").