Weather & Climate in Roadstown, NJ

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

Roadstown 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 104 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	104 ft (32 m)
Area	0.8 sq mi (2.2 km²)
Population Density	205/sq mi
Coordinates	39.4432°N, 75.3168°W
Timezone	America/New_York
County	Salem County County
Nearest Airport	Philadelphia International (PHL) 30 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

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

Apr 5, 2024	2024 Tewksbury, New Jersey Earthquake	M4.8	147 km	3 km
Jan 16, 1994	2 km W of Sinking Spring, Pennsylvania	M4.6	116 km	5 km
Jan 16, 1994	0 km E of Sinking Spring, Pennsylvania	M4.2	115 km	5 km
Apr 5, 2024	7 km WSW of Gladstone, New Jersey	M3.7	147 km	4 km
Oct 23, 1990	3 km W of Hancocks Bridge, New Jersey	M3.2	18 km	10 km
Aug 26, 2003	4 km NNW of Milford, New Jersey	M3.1	131 km	3 km
Jan 9, 1992	4 km WNW of Robertsville, New Jersey	M3.1	132 km	8 km
Nov 14, 1997	0 km S of Rothsville, Pennsylvania	M3.0	112 km	5 km
Jan 16, 1994	0 km SSE of Sinking Spring, Pennsylvania	M2.9	114 km	5 km
Apr 27, 2024	7 km WSW of Gladstone, New Jersey	M2.9	147 km	5 km
May 24, 2024	6 km E of Califon, New Jersey	M2.9	149 km	7 km
Sep 15, 2019	5 km ESE of East Berlin, Pennsylvania	M2.8	147 km	5 km
May 10, 1993	1 km NW of Whitfield, Pennsylvania	M2.8	117 km	5 km
Jul 1, 2009	3 km ESE of Pennsville, New Jersey	M2.8	27 km	5 km
Mar 11, 1995	0 km ENE of Landisville, Pennsylvania	M2.7	118 km	5 km
Oct 28, 1994	1 km E of Mount Vernon, Maryland	M2.7	111 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	68 km	2 km
Jan 18, 1994	3 km SE of Clay, Pennsylvania	M2.6	114 km	5 km
Oct 28, 1996	2 km W of Reinholds, Pennsylvania	M2.6	116 km	5 km

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

Hurricane History

7 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	259 km
2012	Sandy	Category 2	92 mph	223 km
2011	Irene	Category 1	75 mph	152 km
1993	Emily	Category 3	109 mph	296 km
1991	Bob	Category 3	109 mph	209 km
1986	Charley	Category 1	75 mph	227 km
1985	Gloria	Category 2	98 mph	136 km

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

Tornado History

311 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 11 fatalities, 245 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 1, 2023	EF3	81 km	14.3 mi	1
Sep 1, 2021	EF3	27 km	12.4 mi	0
Jul 29, 2021	EF3	81 km	3.4 mi	0
Jul 27, 1994	EF3	51 km	4.0 mi	0
Jul 27, 1994	EF3	89 km	2.0 mi	3
Jul 21, 1983	EF3	92 km	0.2 mi	0
Apr 28, 1961	EF3	33 km	0.3 mi	0
Mar 22, 1955	EF3	64 km	9.6 mi	1
Sep 1, 2021	EF2	74 km	8.3 mi	1
Sep 1, 2021	EF2	67 km	5.9 mi	0
Aug 4, 2020	EF2	77 km	20.8 mi	0
Aug 4, 2020	EF2	41 km	35.8 mi	0
Oct 31, 2019	EF2	55 km	0.5 mi	0
May 28, 2019	EF2	94 km	3.1 mi	0
Apr 15, 2019	EF2	100 km	6.2 mi	0
Feb 24, 2016	EF2	88 km	4.9 mi	0
Sep 28, 2004	EF2	36 km	5.0 mi	0
Sep 18, 2004	EF2	95 km	2.0 mi	0
May 2, 2002	EF2	63 km	4.5 mi	0
Aug 20, 1999	EF2	92 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	—	—	141 km
1840	PHILADELPHIA, PENNSYLVANIA	Earthquake	—	—	41 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	99 km
2007	WARREN GROVE	15,315	88 km
2022	MULLICA RIVER FIRE	13,082	61 km
1999	BASS RIVER	12,129	78 km
2019	SPRING HILL FIRE	8,182	84 km
2023	ALLEN ROAD	6,213	76 km
1992	FORKED RIVER MOUTAIN APR	5,093	100 km
1992	UNNAMED	4,470	93 km
2024	TEA TIME HILL	4,444	73 km
2006	UNNAMED	3,780	67 km
2017	PENN SWAMP FIRE	3,587	64 km
1989	SIMM PLACE	3,262	85 km
2002	UNNAMED	2,824	94 km
2007	ATSION	2,705	60 km
1992	FOUR MILE COLONY	2,647	80 km
1996	UNNAMED	2,625	70 km
2010	FORT DIX RANGE 1-14	2,615	93 km
1990	UNNAMED	2,367	59 km
1996	UNNAMED	2,122	58 km
1997	UNNAMED	2,121	59 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

Roadstown 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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