Weather & Climate in Donegal, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Donegal experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 27°F in January while summers reach 70°F in July. Annual precipitation totals 50.1 inches (wetter than the 38-inch national average). The area receives 29.8 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 39. 77% of days have good air quality. The city sits at an elevation of 1,844 feet.
Temperature
27°F Jan (-3°C)
70°F Jul (21°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 1,844 ft (562 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 374/sq mi |
| Coordinates | 40.1120°N, 79.3808°W |
| Timezone | America/New_York |
| County | Westmoreland County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
| Good Days % | 76.6% |
| Unhealthy Days | 0 |
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
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.5.
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 91 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
240 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 7 fatalities, 432 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 15 km | 36.5 mi | 0 |
| Jun 3, 1980 | EF4 | 67 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 48 km | 13.0 mi | 1 |
| Jun 3, 1980 | EF3 | 79 km | 29.8 mi | 0 |
| Jul 11, 1976 | EF3 | 28 km | 11.8 mi | 1 |
| May 19, 1967 | EF3 | 82 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 48 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 40 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 60 km | 5.8 mi | 0 |
| Aug 25, 2023 | EF2 | 19 km | 2.0 mi | 0 |
| Aug 1, 2022 | EF2 | 99 km | 1.8 mi | 0 |
| Mar 31, 2022 | EF2 | 80 km | 8.6 mi | 0 |
| Oct 21, 2021 | EF2 | 97 km | 15.7 mi | 0 |
| Oct 2, 2018 | EF2 | 4 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 36 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 53 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 86 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 32 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 46 km | 12.0 mi | 0 |
| Aug 15, 1997 | EF2 | 25 km | 3.5 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 | 68 km |
| 2005 | UNNAMED | 510 | 60 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 5.0 in | Coldest, Wettest |
| February | 30°F (-1°C) | 3.5 in | |
| March | 37°F (3°C) | 3.7 in | |
| April | 49°F (9°C) | 4.1 in | |
| May | 59°F (15°C) | 4.7 in | |
| June | 67°F (19°C) | 4.9 in | |
| July | 70°F (21°C) | 4.6 in | Warmest |
| August | 69°F (21°C) | 4.2 in | |
| September | 63°F (17°C) | 3.9 in | |
| October | 52°F (11°C) | 3.3 in | Driest |
| November | 41°F (5°C) | 3.7 in | |
| December | 33°F (0°C) | 4.7 in |
Donegal has a seasonal temperature swing of 43°F / from 27°F in January to 70°F in July. Total annual precipitation is 50.1 inches, with January being the wettest month (5.0") and October the driest (3.3").