Weather & Climate in Sheppards Mill, NJ

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

Sheppards Mill experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 33°F in January while summers reach 77°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 47.7 inches (wetter than the 38-inch national average). The area receives 11.8 inches of snow annually. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 21 feet.

Temperature

33°F Jan (1°C) 77°F Jul (25°C)

Annual Average	54.9°F
	2% above US avg
January Average	33°F (1°C)
July Average	77°F (25°C)
Sunny Days	293 days/yr

Geography

Elevation	21 ft (6 m)
Area	0.3 sq mi (0.8 km²)
Population Density	222/sq mi
Coordinates	39.4124°N, 75.3137°W
Timezone	America/New_York
County	Salem County County
Nearest Airport	Philadelphia International (PHL) 32 miles away

Precipitation & Snow

Annual Rainfall 47.7"

26% above US avg

Snowfall 11.8"

Wettest Month (Aug) 4.13"

Driest Month (Feb) 3.03"

Air Quality

AQI Median	39.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	76.5 / 100
Social Vulnerability	27.4 / 100
Community Resilience	89.5 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Relatively Low
Earthquake	Relatively Low
Wildfire	Relatively Low
Flood	Relatively Low
Hail	Relatively Low
Strong Wind	Relatively High
Heat Wave	Relatively Low
Winter Weather	Relatively Moderate
Lightning	Relatively Low
Ice Storm	Relatively High
Drought	Relatively Moderate
Cold Wave	Relatively Low
Landslide	Very Low
Coastal Flood	Very High

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

Earthquake History

24 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.

Jan 16, 1994	2 km W of Sinking Spring, Pennsylvania	M4.6	119 km	5 km
Jan 16, 1994	0 km E of Sinking Spring, Pennsylvania	M4.2	118 km	5 km
Apr 5, 2024	7 km WSW of Gladstone, New Jersey	M3.7	150 km	4 km
Oct 23, 1990	3 km W of Hancocks Bridge, New Jersey	M3.2	20 km	10 km
Aug 26, 2003	4 km NNW of Milford, New Jersey	M3.1	134 km	3 km
Jan 9, 1992	4 km WNW of Robertsville, New Jersey	M3.1	134 km	8 km
Nov 14, 1997	0 km S of Rothsville, Pennsylvania	M3.0	114 km	5 km
Jan 16, 1994	0 km SSE of Sinking Spring, Pennsylvania	M2.9	117 km	5 km
Sep 15, 2019	5 km ESE of East Berlin, Pennsylvania	M2.8	148 km	5 km
May 10, 1993	1 km NW of Whitfield, Pennsylvania	M2.8	120 km	5 km
Jul 1, 2009	3 km ESE of Pennsville, New Jersey	M2.8	30 km	5 km
Oct 28, 1994	1 km E of Mount Vernon, Maryland	M2.7	111 km	—
Mar 11, 1995	0 km ENE of Landisville, Pennsylvania	M2.7	120 km	5 km
Mar 15, 1993	5 km W of Columbia, Maryland	M2.7	138 km	5 km
Jan 25, 2015	4 km ESE of Downingtown, Pennsylvania	M2.6	72 km	2 km
Jan 18, 1994	3 km SE of Clay, Pennsylvania	M2.6	117 km	5 km
Oct 28, 1996	2 km W of Reinholds, Pennsylvania	M2.6	119 km	5 km
Jun 25, 2021	2 km SE of Woodlawn, Maryland	M2.6	121 km	3 km
Jan 13, 1990	6 km ENE of Eldersburg, Maryland	M2.6	135 km	5 km
Apr 5, 2024	6 km ESE of Califon, New Jersey	M2.6	150 km	6 km

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

Hurricane History

8 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.

Year	Name	Category	Max Wind	Closest
2014	Arthur	Category 1	92 mph	256 km
2012	Sandy	Category 2	92 mph	221 km
2011	Irene	Category 1	75 mph	148 km
1999	Floyd	Category 1	—	299 km
1993	Emily	Category 3	109 mph	293 km
1991	Bob	Category 3	109 mph	208 km
1986	Charley	Category 1	75 mph	224 km
1985	Gloria	Category 2	98 mph	133 km

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

Tornado History

307 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 11 fatalities, 244 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 1, 2023	EF3	78 km	14.3 mi	1
Sep 1, 2021	EF3	30 km	12.4 mi	0
Jul 29, 2021	EF3	84 km	3.4 mi	0
Jul 27, 1994	EF3	93 km	2.0 mi	3
Jul 27, 1994	EF3	53 km	4.0 mi	0
Jul 21, 1983	EF3	93 km	0.2 mi	0
Apr 28, 1961	EF3	36 km	0.3 mi	0
Mar 22, 1955	EF3	67 km	9.6 mi	1
Sep 1, 2021	EF2	69 km	5.9 mi	0
Sep 1, 2021	EF2	78 km	8.3 mi	1
Aug 4, 2020	EF2	38 km	35.8 mi	0
Aug 4, 2020	EF2	80 km	20.8 mi	0
Oct 31, 2019	EF2	59 km	0.5 mi	0
May 28, 2019	EF2	97 km	3.1 mi	0
Apr 15, 2019	EF2	97 km	6.2 mi	0
Feb 24, 2016	EF2	90 km	4.9 mi	0
Sep 28, 2004	EF2	39 km	5.0 mi	0
Sep 18, 2004	EF2	96 km	2.0 mi	0
May 2, 2002	EF2	65 km	4.5 mi	0
Aug 20, 1999	EF2	93 km	0.4 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	—	—	144 km
1840	PHILADELPHIA, PENNSYLVANIA	Earthquake	—	—	44 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: WARREN GROVE (15,315 acres, 2007).

Year	Name	Acres Burned	Distance
2007	WARREN GROVE	15,315	89 km
2022	MULLICA RIVER FIRE	13,082	62 km
1999	BASS RIVER	12,129	79 km
2019	SPRING HILL FIRE	8,182	85 km
2023	ALLEN ROAD	6,213	77 km
1992	UNNAMED	4,470	95 km
2024	TEA TIME HILL	4,444	74 km
2006	UNNAMED	3,780	68 km
2017	PENN SWAMP FIRE	3,587	65 km
1989	SIMM PLACE	3,262	86 km
2002	UNNAMED	2,824	96 km
2007	ATSION	2,705	62 km
1992	FOUR MILE COLONY	2,647	82 km
1996	UNNAMED	2,625	71 km
2010	FORT DIX RANGE 1-14	2,615	95 km
1990	UNNAMED	2,367	61 km
1996	UNNAMED	2,122	60 km
1997	UNNAMED	2,121	60 km
1993	UNNAMED	1,860	61 km
1997	UNNAMED	1,833	75 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	33°F (1°C)	3.5 in	Coldest
February	35°F (2°C)	3.0 in	Driest
March	43°F (6°C)	4.1 in
April	52°F (11°C)	3.7 in
May	62°F (17°C)	4.0 in
June	71°F (22°C)	3.4 in
July	77°F (25°C)	4.1 in	Warmest
August	75°F (24°C)	4.1 in	Wettest
September	68°F (20°C)	3.8 in
October	57°F (14°C)	3.2 in
November	47°F (8°C)	3.3 in
December	38°F (3°C)	3.6 in

Sheppards Mill has a seasonal temperature swing of 44°F / from 33°F in January to 77°F in July. Total annual precipitation is 43.8 inches, with August being the wettest month (4.1") and February the driest (3.0").

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