Weather & Climate in Dayton, NJ

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

Dayton experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 75°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 47.5 inches (wetter than the 38-inch national average). The area receives 23.7 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 108 feet.

Temperature

31°F Jan (-1°C) 75°F Jul (24°C)

Annual Average	52.8°F
	2% below US avg
January Average	31°F (-1°C)
July Average	75°F (24°C)
Sunny Days	275 days/yr

Geography

Elevation	108 ft (33 m)
Area	2.1 sq mi (5.4 km²)
Population Density	3,420/sq mi
Coordinates	40.3779°N, 74.5078°W
Timezone	America/New_York
County	Middlesex County County
Nearest Airport	Central Jersey Regional (JVI) 11 miles away

Precipitation & Snow

Annual Rainfall 47.5"

25% above US avg

Snowfall 23.7"

Wettest Month (Jul) 4.96"

Driest Month (Feb) 2.95"

Air Quality

AQI Median	39.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	97.8 / 100
Social Vulnerability	47.4 / 100
Community Resilience	45.5 / 100

Hazard Breakdown

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

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

Earthquake History

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

Apr 5, 2024	2024 Tewksbury, New Jersey Earthquake	M4.8	41 km	3 km
Jan 16, 1994	2 km W of Sinking Spring, Pennsylvania	M4.6	130 km	5 km
Jan 16, 1994	0 km E of Sinking Spring, Pennsylvania	M4.2	127 km	5 km
Apr 5, 2024	7 km WSW of Gladstone, New Jersey	M3.7	40 km	4 km
Oct 23, 1990	3 km W of Hancocks Bridge, New Jersey	M3.2	129 km	10 km
Jan 9, 1992	4 km WNW of Robertsville, New Jersey	M3.1	14 km	8 km
Aug 26, 2003	4 km NNW of Milford, New Jersey	M3.1	57 km	3 km
Aug 3, 2025	0 km W of Little Ferry, New Jersey	M3.0	66 km	10 km
Oct 28, 1991	3 km WNW of Stamford, Connecticut	M3.0	110 km	10 km
Feb 3, 2009	1 km ESE of Victory Gardens, New Jersey	M3.0	55 km	0 km
Jan 16, 1994	0 km SSE of Sinking Spring, Pennsylvania	M2.9	127 km	5 km
May 24, 2024	6 km E of Califon, New Jersey	M2.9	43 km	7 km
Apr 27, 2024	7 km WSW of Gladstone, New Jersey	M2.9	40 km	5 km
May 10, 1993	1 km NW of Whitfield, Pennsylvania	M2.8	128 km	5 km
Aug 5, 2025	1 km N of Hillsdale, New Jersey	M2.8	81 km	12 km
Jul 1, 2009	3 km ESE of Pennsville, New Jersey	M2.8	116 km	5 km
Apr 12, 1991	2 km ENE of North Castle, New York	M2.7	112 km	9 km
Jan 25, 2015	4 km ESE of Downingtown, Pennsylvania	M2.6	106 km	2 km
Jul 5, 1996	2 km NW of Chester Heights, Pennsylvania	M2.6	99 km	18 km
Apr 5, 2024	6 km ESE of Califon, New Jersey	M2.6	41 km	6 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
2014	Arthur	Category 1	81 mph	285 km
2012	Sandy	Category 2	92 mph	257 km
2011	Irene	Category 1	75 mph	257 km
1991	Bob	Category 2	109 mph	196 km
1985	Gloria	Category 2	98 mph	88 km

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

Tornado History

266 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 6 fatalities, 188 injuries.

Date	Rating	Distance	Path	Fatalities
Jul 29, 2021	EF3	50 km	3.4 mi	0
Jul 27, 1994	EF3	87 km	2.0 mi	3
Oct 18, 1990	EF3	25 km	0.5 mi	0
Jul 21, 1983	EF3	81 km	0.2 mi	0
Sep 26, 1977	EF3	1 km	5.9 mi	0
Mar 21, 1976	EF3	88 km	0.5 mi	0
May 28, 1973	EF3	47 km	0.4 mi	0
May 28, 1973	EF3	56 km	0.4 mi	0
Jun 24, 1960	EF3	25 km	12.9 mi	0
Apr 1, 2023	EF2	49 km	0.1 mi	0
Apr 1, 2023	EF2	27 km	2.1 mi	0
Apr 1, 2023	EF2	32 km	1.6 mi	0
Feb 21, 2023	EF2	20 km	5.8 mi	0
Sep 1, 2021	EF2	69 km	8.3 mi	1
Jul 29, 2021	EF2	38 km	6.3 mi	0
Jul 29, 2021	EF2	74 km	4.2 mi	0
Aug 4, 2020	EF2	51 km	20.8 mi	0
Jul 29, 2009	EF2	97 km	7.4 mi	0
Jul 29, 2009	EF2	88 km	4.6 mi	0
Aug 8, 2007	EF2	44 km	5.9 mi	0

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

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 0.3 m (1 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1964	LONG ISLAND, NY	Meteorological	0.3 m	—	128 km
1895	HIGH BRIDGE, NJ	Earthquake	—	—	45 km
1840	PHILADELPHIA, PENNSYLVANIA	Earthquake	—	—	87 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (23,000 acres, 1985).

Year	Name	Acres Burned	Distance
1985	UNNAMED	23,000	97 km
1995	GREENWOOD STATE FOREST	21,271	63 km
2007	WARREN GROVE	15,315	77 km
2022	MULLICA RIVER FIRE	13,082	78 km
1999	BASS RIVER	12,129	79 km
2019	SPRING HILL FIRE	8,182	66 km
2023	ALLEN ROAD	6,213	81 km
1992	FORKED RIVER MOUTAIN APR	5,093	61 km
2024	JENNINGS CREEK	5,069	91 km
1992	POWER PLANT	4,928	65 km
1992	UNNAMED	4,470	42 km
2024	TEA TIME HILL	4,444	66 km
2006	UNNAMED	3,780	74 km
2017	PENN SWAMP FIRE	3,587	79 km
2023	JIMMYS WATER HOLE	3,585	43 km
1989	SIMM PLACE	3,262	67 km
2002	UNNAMED	2,824	41 km
2007	ATSION	2,705	75 km
1992	FOUR MILE COLONY	2,647	58 km
1996	UNNAMED	2,625	79 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	31°F (-1°C)	3.8 in	Coldest
February	32°F (-0°C)	3.0 in	Driest
March	41°F (5°C)	4.0 in
April	50°F (10°C)	4.1 in
May	60°F (16°C)	4.5 in
June	69°F (21°C)	4.0 in
July	75°F (24°C)	5.0 in	Warmest, Wettest
August	73°F (23°C)	4.5 in
September	66°F (19°C)	4.3 in
October	54°F (12°C)	3.5 in
November	45°F (7°C)	3.9 in
December	35°F (2°C)	3.8 in

Dayton has a seasonal temperature swing of 44°F / from 31°F in January to 75°F in July. Total annual precipitation is 48.3 inches, with July being the wettest month (5.0") and February the driest (3.0").

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