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Weather & Climate in Grantsville, MD
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grantsville experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 26°F in January while summers reach 68°F in July. The area gets 293 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 41.7 inches. The area receives 45.7 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 2,302 feet.
Temperature
26°F Jan (-4°C)
68°F Jul (20°C)
| Annual Average | 47.1°F |
| 13% below US avg | |
| January Average | 26°F (-4°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 2,302 ft (702 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 933/sq mi |
| Coordinates | 39.6969°N, 79.1528°W |
| Timezone | America/New_York |
| County | Garrett County County |
| Nearest Airport | Greater Cumberland Regional (CBE) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 16.0 / 100 |
| Social Vulnerability | 48.4 / 100 |
| Community Resilience | 57.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.0.
| Jan 17, 2016 | 3 km NE of Ranson, West Virginia | M3.0 | 121 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 121 km | 4 km |
| Aug 15, 2010 | 19 km ESE of Burnsville, West Virginia | M2.5 | 147 km | 17 km |
| Aug 21, 2010 | 19 km WNW of Helvetia, West Virginia | M2.5 | 147 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
183 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 204 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 40 km | 36.5 mi | 0 |
| May 31, 1998 | EF3 | 9 km | 13.0 mi | 1 |
| Jun 3, 1980 | EF3 | 67 km | 29.8 mi | 0 |
| Jul 11, 1976 | EF3 | 78 km | 11.8 mi | 1 |
| May 19, 1967 | EF3 | 38 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 93 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 89 km | 10.8 mi | 0 |
| Aug 25, 2023 | EF2 | 39 km | 2.0 mi | 0 |
| Oct 2, 2018 | EF2 | 54 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 82 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 97 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 18 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 36 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 43 km | 12.0 mi | 0 |
| Aug 15, 1997 | EF2 | 72 km | 3.5 mi | 0 |
| Jun 30, 1990 | EF2 | 97 km | 0.2 mi | 0 |
| Oct 1, 1986 | EF2 | 57 km | 4.5 mi | 0 |
| May 22, 1983 | EF2 | 90 km | 38.0 mi | 0 |
| Jul 26, 1981 | EF2 | 97 km | 0.1 mi | 0 |
| Jun 3, 1980 | EF2 | 97 km | 4.9 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
13 wildfires (100+ acres) recorded within 100 km. Largest: WAITES RUN (5,496 acres, 2024).
| Year | Name | Acres Burned | Distance |
| 2024 | WAITES RUN | 5,496 | 88 km |
| 2001 | NEW CREEK MTN | 1,689 | 78 km |
| 2024 | DOVE HOLLOW | 1,634 | 90 km |
| 2020 | UNNAMED | 1,572 | 97 km |
| 2013 | SMOKE HOLE FIRE | 1,436 | 94 km |
| 2019 | DRY HOLLOW | 1,327 | 97 km |
| 2000 | BRAKE RUN SHEN. MT. RD. | 1,055 | 93 km |
| 2014 | BEAR DEN | 945 | 44 km |
| 2024 | SPRING RUN | 847 | 87 km |
| 2012 | WOLF GAP | 710 | 95 km |
| 1994 | ELKHORN TOWER | 696 | 87 km |
| 2001 | SOUTH BRANCH | 519 | 62 km |
| 2005 | UNNAMED | 510 | 36 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-4°C) | 2.9 in | Coldest |
| February | 27°F (-3°C) | 2.8 in | Driest |
| March | 36°F (2°C) | 3.6 in | |
| April | 46°F (8°C) | 3.8 in | |
| May | 56°F (13°C) | 4.1 in | |
| June | 64°F (18°C) | 3.9 in | |
| July | 68°F (20°C) | 4.2 in | Warmest, Wettest |
| August | 67°F (19°C) | 3.7 in | |
| September | 60°F (16°C) | 3.4 in | |
| October | 49°F (10°C) | 3.0 in | |
| November | 40°F (4°C) | 3.4 in | |
| December | 30°F (-1°C) | 3.2 in |
Grantsville has a seasonal temperature swing of 42°F / from 26°F in January to 68°F in July. Total annual precipitation is 42.0 inches, with July being the wettest month (4.2") and February the driest (2.8").