Weather & Climate in Jennerstown, PA

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

Jennerstown 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 1,877 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	1,877 ft (572 m)
Area	1.9 sq mi (5.0 km²)
Population Density	601/sq mi
Coordinates	40.1633°N, 79.0610°W
Timezone	America/New_York
County	Westmoreland County County
Nearest Airport	Arnold Palmer Regional (LBE) 20 miles away

Precipitation & Snow

Annual Rainfall 56.6"

49% above US avg

Snowfall 142.2"

Wettest Month (May) 4.17"

Driest Month (Feb) 2.80"

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	135 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	119 km	4 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

210 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 376 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 2, 1998	EF4	19 km	36.5 mi	0
Jun 3, 1980	EF4	78 km	11.8 mi	0
May 31, 1998	EF3	46 km	13.0 mi	1
Jul 11, 1976	EF3	43 km	11.8 mi	1
May 19, 1967	EF3	90 km	0.3 mi	1
Aug 3, 1963	EF3	72 km	0.1 mi	2
Jun 26, 2024	EF2	57 km	10.8 mi	0
May 11, 2024	EF2	86 km	5.8 mi	0
Aug 25, 2023	EF2	41 km	2.0 mi	0
Mar 31, 2022	EF2	79 km	8.6 mi	0
Oct 2, 2018	EF2	29 km	1.6 mi	0
Mar 23, 2011	EF2	59 km	9.0 mi	0
Apr 28, 2002	EF2	47 km	5.0 mi	0
Jun 2, 1998	EF2	87 km	15.0 mi	0
Jun 2, 1998	EF2	68 km	12.0 mi	0
Jun 2, 1998	EF2	38 km	15.0 mi	0
Aug 15, 1997	EF2	29 km	3.5 mi	0
Jul 19, 1996	EF2	86 km	27.4 mi	0
Jul 19, 1996	EF2	50 km	6.0 mi	0
Sep 26, 1994	EF2	70 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	49 km
2005	UNNAMED	510	43 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

Jennerstown 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").

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