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Weather & Climate in Casselman, PA

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

Casselman experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 28°F in January while summers reach 72°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 47.2 inches (wetter than the 38-inch national average). The area receives 61.2 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 1,770 feet.

Temperature

28°F Jan (-2°C) 72°F Jul (22°C)
Annual Average50.4°F
7% below US avg
January Average28°F (-2°C)
July Average72°F (22°C)
Sunny Days293 days/yr

Geography

Elevation1,770 ft (539 m)
Area0.1 sq mi (0.2 km²)
Population Density310/sq mi
Coordinates39.8854°N, 79.2107°W
TimezoneAmerica/New_York
CountySomerset County County
Nearest AirportArnold Palmer Regional (LBE)
29 miles away

Precipitation & Snow

Annual Rainfall 47.2"
24% above US avg
Snowfall 61.2"
Wettest Month (Jul) 4.41"
Driest Month (Feb) 2.80"

Air Quality

AQI Median40.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score64.2 / 100
Social Vulnerability51.8 / 100
Community Resilience81.6 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Relatively Low
Earthquake Very Low
Wildfire Very Low
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively Moderate
Heat Wave Very Low
Winter Weather Relatively Moderate
Lightning Relatively Moderate
Ice Storm Relatively Low
Drought Relatively Low
Cold Wave Very Low
Landslide Relatively Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.0.

Jan 17, 2016 3 km NE of Ranson, West Virginia M3.0 134 km 5 km
Sep 11, 2024 4 km WNW of Claysville, Pennsylvania M2.5 110 km 4 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

212 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 343 injuries.

Date Rating Distance Path Fatalities
Jun 2, 1998 EF4 18 km 36.5 mi 0
Jun 3, 1980 EF4 96 km 11.8 mi 0
May 31, 1998 EF3 19 km 13.0 mi 1
Jun 3, 1980 EF3 71 km 29.8 mi 0
Jul 11, 1976 EF3 57 km 11.8 mi 1
May 19, 1967 EF3 57 km 0.3 mi 1
Aug 3, 1963 EF3 75 km 0.1 mi 2
Jun 26, 2024 EF2 68 km 10.8 mi 0
May 11, 2024 EF2 84 km 5.8 mi 0
Aug 25, 2023 EF2 23 km 2.0 mi 0
Oct 2, 2018 EF2 33 km 1.6 mi 0
Mar 23, 2011 EF2 63 km 9.0 mi 0
Apr 28, 2002 EF2 76 km 5.0 mi 0
Jun 2, 1998 EF2 58 km 15.0 mi 0
Jun 2, 1998 EF2 40 km 12.0 mi 0
Jun 2, 1998 EF2 4 km 15.0 mi 0
Aug 15, 1997 EF2 50 km 3.5 mi 0
Jul 19, 1996 EF2 84 km 6.0 mi 0
Jun 30, 1990 EF2 84 km 0.2 mi 0
Oct 1, 1986 EF2 46 km 4.5 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

4 wildfires (100+ acres) recorded within 100 km. Largest: NEW CREEK MTN (1,689 acres, 2001).

Year Name Acres Burned Distance
2001 NEW CREEK MTN 1,689 98 km
2014 BEAR DEN 945 46 km
2001 SOUTH BRANCH 519 83 km
2005 UNNAMED 510 37 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 28°F (-2°C) 3.0 in
February 28°F (-2°C) 2.8 in Coldest, Driest
March 36°F (2°C) 3.7 in
April 47°F (8°C) 4.0 in
May 57°F (14°C) 4.2 in
June 64°F (18°C) 4.1 in
July 72°F (22°C) 4.4 in Warmest, Wettest
August 68°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 (5°C) 3.5 in
December 31°F (-1°C) 3.4 in

Casselman has a seasonal temperature swing of 44°F / from 28°F in February to 72°F in July. Total annual precipitation is 43.7 inches, with July being the wettest month (4.4") and February the driest (2.8").

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