Weather & Climate in Liberty borough (Allegheny County), PA

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

Liberty borough (Allegheny County) experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 73°F in July. The area gets 275 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 42.4 inches. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 1,027 feet.

Temperature

30°F Jan (-1°C) 73°F Jul (23°C)

Annual Average	51.7°F
	4% below US avg
January Average	30°F (-1°C)
July Average	73°F (23°C)
Sunny Days	275 days/yr

Geography

Elevation	1,027 ft (313 m)
Area	0.6 sq mi (1.5 km²)
Population Density	1,610/sq mi
Coordinates	40.3217°N, 79.8632°W
Timezone	America/New_York
County	Allegheny County County
Nearest Airport	Pittsburgh International (PIT) 23 miles away

Precipitation & Snow

Annual Rainfall 42.4"

11% above US avg

Wettest Month (May) 3.94"

Driest Month (Feb) 2.32"

Air Quality

AQI Median	40.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	98.1 / 100
Social Vulnerability	32.7 / 100
Community Resilience	91.9 / 100

Hazard Breakdown

Tornado	Relatively High
Hurricane	Relatively Low
Earthquake	Relatively Low
Wildfire	Very Low
Flood	Very High
Hail	Very Low
Strong Wind	Relatively High
Heat Wave	Relatively Moderate
Winter Weather	Relatively High
Lightning	Relatively High
Ice Storm	Very High
Drought	No Rating
Cold Wave	Very High
Landslide	Relatively Low
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.

Sep 25, 1998	2 km SW of Adamsville, Pennsylvania	M4.5	138 km	5 km
Jun 3, 2017	1 km WNW of Batesville, Ohio	M3.4	130 km	2 km
Apr 22, 2025	3 km ESE of Buffalo, Ohio	M3.1	146 km	5 km
Apr 2, 2017	5 km W of Graysville, Ohio	M3.0	138 km	4 km
Mar 30, 2024	2 km SSW of Maple Ridge, Ohio	M3.0	120 km	6 km
Aug 7, 2000	2 km S of Limaville, Ohio	M2.9	130 km	5 km
Apr 29, 2025	1 km SE of Pleasant City, Ohio	M2.8	149 km	2 km
Sep 11, 2024	4 km WNW of Claysville, Pennsylvania	M2.5	55 km	4 km

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

Tornado History

280 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 15 fatalities, 555 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 2, 1998	EF4	62 km	36.5 mi	0
Jun 3, 1980	EF4	38 km	11.8 mi	0
May 31, 1998	EF3	92 km	13.0 mi	1
May 31, 1985	EF3	76 km	39.0 mi	9
Jun 3, 1980	EF3	88 km	29.8 mi	0
Jul 11, 1976	EF3	31 km	11.8 mi	1
Aug 3, 1963	EF3	1 km	0.1 mi	2
Jun 26, 2024	EF2	19 km	10.8 mi	0
May 11, 2024	EF2	18 km	5.8 mi	0
May 7, 2024	EF2	85 km	15.3 mi	0
Aug 25, 2023	EF2	53 km	2.0 mi	0
Aug 1, 2022	EF2	66 km	1.8 mi	0
Mar 31, 2022	EF2	70 km	8.6 mi	0
Oct 21, 2021	EF2	56 km	15.7 mi	0
Jul 29, 2021	EF2	98 km	2.7 mi	0
Oct 2, 2018	EF2	44 km	1.6 mi	0
Mar 23, 2011	EF2	11 km	9.0 mi	0
Apr 28, 2002	EF2	60 km	5.0 mi	0
Apr 9, 2001	EF2	97 km	4.0 mi	0
Jun 2, 1998	EF2	66 km	12.0 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	30°F (-1°C)	2.5 in	Coldest
February	31°F (-1°C)	2.3 in	Driest
March	40°F (4°C)	3.4 in
April	50°F (10°C)	3.3 in
May	60°F (16°C)	3.9 in	Wettest
June	68°F (20°C)	3.8 in
July	73°F (23°C)	3.8 in	Warmest
August	71°F (22°C)	3.7 in
September	64°F (18°C)	3.2 in
October	53°F (12°C)	2.6 in
November	43°F (6°C)	3.0 in
December	33°F (1°C)	2.8 in

Liberty borough (Allegheny County) has a seasonal temperature swing of 44°F / from 30°F in January to 73°F in July. Total annual precipitation is 38.1 inches, with May being the wettest month (3.9") and February the driest (2.3").

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