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Weather & Climate in Boswell, PA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Boswell 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 1,873 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 | 1,873 ft (571 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 1,909/sq mi |
| Coordinates | 40.1615°N, 79.0275°W |
| Timezone | America/New_York |
| County | Westmoreland County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 22 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 | 132 km | 27 km |
| Jan 17, 2016 | 3 km NE of Ranson, West Virginia | M3.0 | 139 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 121 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
207 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 5 fatalities, 326 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 2, 1998 | EF4 | 21 km | 36.5 mi | 0 |
| Jun 3, 1980 | EF4 | 81 km | 11.8 mi | 0 |
| May 31, 1998 | EF3 | 46 km | 13.0 mi | 1 |
| Jul 11, 1976 | EF3 | 45 km | 11.8 mi | 1 |
| May 19, 1967 | EF3 | 91 km | 0.3 mi | 1 |
| Aug 3, 1963 | EF3 | 75 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 60 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 89 km | 5.8 mi | 0 |
| Aug 25, 2023 | EF2 | 44 km | 2.0 mi | 0 |
| Mar 31, 2022 | EF2 | 80 km | 8.6 mi | 0 |
| Oct 2, 2018 | EF2 | 32 km | 1.6 mi | 0 |
| Mar 23, 2011 | EF2 | 62 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF2 | 49 km | 5.0 mi | 0 |
| Jun 2, 1998 | EF2 | 87 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 39 km | 15.0 mi | 0 |
| Jun 2, 1998 | EF2 | 70 km | 12.0 mi | 0 |
| Aug 15, 1997 | EF2 | 31 km | 3.5 mi | 0 |
| Jul 19, 1996 | EF2 | 49 km | 6.0 mi | 0 |
| Jul 19, 1996 | EF2 | 86 km | 27.4 mi | 0 |
| Sep 26, 1994 | EF2 | 69 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 | 47 km |
| 2005 | UNNAMED | 510 | 41 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 |
Boswell 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").