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Weather & Climate in Gray CDP (Somerset County), PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gray CDP (Somerset County) experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 23°F in January while summers reach 66°F in July. The area gets 271 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 56.6 inches (wetter than the 38-inch national average). The area receives 142.2 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 1,834 feet.
Temperature
23°F Jan (-5°C)
66°F Jul (19°C)
| Annual Average | 45.6°F |
| 16% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 1,834 ft (559 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 1,024/sq mi |
| Coordinates | 40.1330°N, 79.0924°W |
| Timezone | America/New_York |
| County | Westmoreland County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.9 / 100 |
| Social Vulnerability | 30.2 / 100 |
| Community Resilience | 92.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Jun 13, 2019 | 9 km N of Blain, Pennsylvania | M3.4 | 138 km | 27 km |
| Jan 17, 2016 | 3 km NE of Ranson, West Virginia | M3.0 | 141 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 116 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
216 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 403 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 14 km | 36.5 mi | 0 |
| Jun 3, 1980 | EF4 | 79 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 43 km | 13.0 mi | 1 |
| Jun 3, 1980 | EF3 | 96 km | 29.8 mi | 0 |
| Jul 11, 1976 | EF3 | 42 km | 11.8 mi | 1 |
| May 19, 1967 | EF3 | 86 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 70 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 56 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 84 km | 5.8 mi | 0 |
| Aug 25, 2023 | EF2 | 37 km | 2.0 mi | 0 |
| Mar 31, 2022 | EF2 | 81 km | 8.6 mi | 0 |
| Oct 2, 2018 | EF2 | 26 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 57 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 50 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 64 km | 12.0 mi | 0 |
| Jun 2, 1998 | EF2 | 34 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 84 km | 15.0 mi | 0 |
| Aug 15, 1997 | EF2 | 29 km | 3.5 mi | 0 |
| Jul 19, 1996 | EF2 | 55 km | 6.0 mi | 0 |
| Jul 19, 1996 | EF2 | 89 km | 27.4 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: BEAR DEN (945 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | BEAR DEN | 945 | 48 km |
| 2005 | UNNAMED | 510 | 42 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 3.0 in | Coldest |
| February | 27°F (-3°C) | 2.8 in | Driest |
| March | 36°F (2°C) | 3.7 in | |
| April | 46°F (8°C) | 3.9 in | |
| May | 56°F (14°C) | 4.2 in | Wettest |
| June | 64°F (18°C) | 4.1 in | |
| July | 66°F (19°C) | 4.2 in | |
| August | 67°F (20°C) | 3.9 in | Warmest |
| September | 61°F (16°C) | 3.6 in | |
| October | 50°F (10°C) | 3.0 in | |
| November | 40°F (4°C) | 3.5 in | |
| December | 30°F (-1°C) | 3.3 in |
Gray CDP (Somerset County) has a seasonal temperature swing of 45°F / from 23°F in January to 67°F in August. Total annual precipitation is 43.1 inches, with May being the wettest month (4.2") and February the driest (2.8").