Weather & Climate in West Conshohocken, PA

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

West Conshohocken experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 32°F in January while summers reach 78°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 50.7 inches (wetter than the 38-inch national average). The area receives 25.3 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 215 feet.

Temperature

32°F Jan (0°C) 78°F Jul (25°C)

Annual Average	55.0°F
	2% above US avg
January Average	32°F (0°C)
July Average	78°F (25°C)
Sunny Days	271 days/yr

Geography

Elevation	215 ft (66 m)
Area	0.4 sq mi (0.9 km²)
Population Density	1,785/sq mi
Coordinates	40.0703°N, 75.3188°W
Timezone	America/New_York
County	Montgomery County County
Nearest Airport	Philadelphia International (PHL) 14 miles away

Precipitation & Snow

Annual Rainfall 50.7"

33% above US avg

Snowfall 25.3"

Wettest Month (Jul) 4.45"

Driest Month (Feb) 2.87"

Air Quality

AQI Median	40.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	96.8 / 100
Social Vulnerability	19.8 / 100
Community Resilience	92.8 / 100

Hazard Breakdown

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

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

Earthquake History

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

Apr 5, 2024	2024 Tewksbury, New Jersey Earthquake	M4.8	84 km	3 km
Jan 16, 1994	2 km W of Sinking Spring, Pennsylvania	M4.6	68 km	5 km
Jan 16, 1994	0 km E of Sinking Spring, Pennsylvania	M4.2	65 km	5 km
Apr 5, 2024	7 km WSW of Gladstone, New Jersey	M3.7	84 km	4 km
Oct 23, 1990	3 km W of Hancocks Bridge, New Jersey	M3.2	64 km	10 km
Aug 26, 2003	4 km NNW of Milford, New Jersey	M3.1	62 km	3 km
Jan 9, 1992	4 km WNW of Robertsville, New Jersey	M3.1	89 km	8 km
Jun 3, 2010	4 km ENE of Franklintown, Pennsylvania	M3.1	141 km	2 km
Nov 14, 1997	0 km S of Rothsville, Pennsylvania	M3.0	80 km	5 km
Aug 3, 2025	0 km W of Little Ferry, New Jersey	M3.0	138 km	10 km
Feb 3, 2009	1 km ESE of Victory Gardens, New Jersey	M3.0	111 km	0 km
Apr 24, 2009	1 km S of Franklintown, Pennsylvania	M2.9	145 km	1 km
Jan 16, 1994	0 km SSE of Sinking Spring, Pennsylvania	M2.9	65 km	5 km
May 24, 2024	6 km E of Califon, New Jersey	M2.9	86 km	7 km
Apr 27, 2024	7 km WSW of Gladstone, New Jersey	M2.9	84 km	5 km
Sep 15, 2019	5 km ESE of East Berlin, Pennsylvania	M2.8	137 km	5 km
May 10, 1993	1 km NW of Whitfield, Pennsylvania	M2.8	67 km	5 km
Jul 1, 2009	3 km ESE of Pennsville, New Jersey	M2.8	49 km	5 km
Oct 25, 2009	4 km ENE of Franklintown, Pennsylvania	M2.8	141 km	1 km
Oct 28, 1994	1 km E of Mount Vernon, Maryland	M2.7	139 km	—

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

Hurricane History

5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.

Year	Name	Category	Max Wind	Closest
2012	Sandy	Category 2	92 mph	269 km
2011	Irene	Category 1	75 mph	221 km
1991	Bob	Category 3	109 mph	238 km
1986	Charley	Category 1	75 mph	297 km
1985	Gloria	Category 2	98 mph	147 km

Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

354 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 9 fatalities, 265 injuries.

Date	Rating	Distance	Path	Fatalities
Sep 1, 2021	EF3	44 km	12.4 mi	0
Jul 29, 2021	EF3	28 km	3.4 mi	0
May 31, 1998	EF3	67 km	8.3 mi	0
Jul 27, 1994	EF3	55 km	4.0 mi	0
Jul 27, 1994	EF3	25 km	2.0 mi	3
Oct 18, 1990	EF3	65 km	0.5 mi	0
Jul 21, 1983	EF3	99 km	0.2 mi	0
Jul 26, 1981	EF3	81 km	3.3 mi	0
Sep 26, 1977	EF3	76 km	5.9 mi	0
Jun 18, 1970	EF3	91 km	1.9 mi	1
Apr 28, 1961	EF3	49 km	0.3 mi	0
Jun 24, 1960	EF3	52 km	12.9 mi	0
Mar 22, 1955	EF3	28 km	9.6 mi	1
Nov 4, 1950	EF3	70 km	15.9 mi	0
Apr 1, 2023	EF2	89 km	1.6 mi	0
Apr 1, 2023	EF2	79 km	2.1 mi	0
Feb 21, 2023	EF2	57 km	5.8 mi	0
Sep 1, 2021	EF2	8 km	8.3 mi	1
Sep 1, 2021	EF2	65 km	5.9 mi	0
Jul 29, 2021	EF2	44 km	6.3 mi	0

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

Tsunami History

2 tsunamis recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1895	HIGH BRIDGE, NJ	Earthquake	—	—	76 km
1840	PHILADELPHIA, PENNSYLVANIA	Earthquake	—	—	32 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: GREENWOOD STATE FOREST (21,271 acres, 1995).

Year	Name	Acres Burned	Distance
1995	GREENWOOD STATE FOREST	21,271	93 km
2007	WARREN GROVE	15,315	93 km
2022	MULLICA RIVER FIRE	13,082	69 km
1999	BASS RIVER	12,129	86 km
2019	SPRING HILL FIRE	8,182	80 km
2023	ALLEN ROAD	6,213	86 km
1992	FORKED RIVER MOUTAIN APR	5,093	91 km
1992	POWER PLANT	4,928	96 km
1992	UNNAMED	4,470	70 km
2024	TEA TIME HILL	4,444	69 km
2006	UNNAMED	3,780	71 km
2017	PENN SWAMP FIRE	3,587	73 km
2023	JIMMYS WATER HOLE	3,585	81 km
1989	SIMM PLACE	3,262	82 km
2002	UNNAMED	2,824	70 km
2007	ATSION	2,705	65 km
1992	FOUR MILE COLONY	2,647	69 km
1996	UNNAMED	2,625	78 km
2010	FORT DIX RANGE 1-14	2,615	68 km
1990	UNNAMED	2,367	57 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	32°F (0°C)	3.5 in	Coldest
February	33°F (0°C)	2.9 in	Driest
March	41°F (5°C)	3.8 in
April	51°F (11°C)	3.8 in
May	62°F (17°C)	4.3 in
June	70°F (21°C)	3.7 in
July	78°F (25°C)	4.5 in	Warmest, Wettest
August	74°F (23°C)	4.3 in
September	67°F (19°C)	4.0 in
October	55°F (13°C)	3.1 in
November	46°F (8°C)	3.7 in
December	36°F (2°C)	3.5 in

West Conshohocken has a seasonal temperature swing of 46°F / from 32°F in January to 78°F in July. Total annual precipitation is 45.0 inches, with July being the wettest month (4.5") and February the driest (2.9").

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