Sign In Register

Weather & Climate in Somerset, PA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Somerset experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 69°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 55.9 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 37. 90% of days have good air quality. The city sits at an elevation of 2,115 feet.

Temperature

24°F Jan (-4°C) 69°F Jul (21°C)
Annual Average47.2°F
13% below US avg
January Average24°F (-4°C)
July Average69°F (21°C)
Sunny Days271 days/yr

Geography

Elevation2,115 ft (645 m)
Area2.7 sq mi (7.1 km²)
Population Density2,192/sq mi
Coordinates40.0050°N, 79.0779°W
TimezoneAmerica/New_York
CountyWestmoreland County County
Nearest AirportArnold Palmer Regional (LBE)
26 miles away

Precipitation & Snow

Annual Rainfall 55.9"
47% above US avg
Wettest Month (May) 4.17"
Driest Month (Feb) 2.80"

Air Quality

AQI Median37.0
RatingGood
Good Days %90.2%
Unhealthy Days0

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score87.9 / 100
Social Vulnerability30.2 / 100
Community Resilience92.8 / 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 M3.4 141 km 27 km
Jan 17, 2016 3 km NE of Ranson, West Virginia M3.0 131 km 5 km
Sep 11, 2024 4 km WNW of Claysville, Pennsylvania M2.5 118 km 4 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

209 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 344 injuries.

Date Rating Distance Path Fatalities
Jun 2, 1998 EF4 13 km 36.5 mi 0
Jun 3, 1980 EF4 91 km 11.8 mi 0
May 31, 1998 EF3 28 km 13.0 mi 1
Jun 3, 1980 EF3 88 km 29.8 mi 0
Jul 11, 1976 EF3 53 km 11.8 mi 1
May 19, 1967 EF3 73 km 0.3 mi 1
Aug 3, 1963 EF3 77 km 0.1 mi 2
Jun 26, 2024 EF2 66 km 10.8 mi 0
May 11, 2024 EF2 89 km 5.8 mi 0
Aug 25, 2023 EF2 34 km 2.0 mi 0
Mar 31, 2022 EF2 95 km 8.6 mi 0
Oct 2, 2018 EF2 31 km 1.6 mi 0
Mar 23, 2011 EF2 64 km 9.0 mi 0
Apr 28, 2002 EF2 64 km 5.0 mi 0
Jun 2, 1998 EF2 70 km 15.0 mi 0
Jun 2, 1998 EF2 22 km 15.0 mi 0
Jun 2, 1998 EF2 57 km 12.0 mi 0
Aug 15, 1997 EF2 42 km 3.5 mi 0
Jul 19, 1996 EF2 67 km 6.0 mi 0
Sep 26, 1994 EF2 87 km 3.5 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

3 wildfires (100+ acres) recorded within 100 km. Largest: BEAR DEN (945 acres, 2014).

Year Name Acres Burned Distance
2014 BEAR DEN 945 39 km
2001 SOUTH BRANCH 519 94 km
2005 UNNAMED 510 31 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-4°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 69°F (21°C) 4.2 in Warmest
August 67°F (20°C) 3.9 in
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

Somerset has a seasonal temperature swing of 45°F / from 24°F in January to 69°F in July. Total annual precipitation is 43.1 inches, with May being the wettest month (4.2") and February the driest (2.8").

View full profile of Somerset, PA →