Weather & Climate in Port Monmouth, NJ

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

Port Monmouth experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 33°F in January while summers reach 75°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 52.5 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 3 feet.

Temperature

33°F Jan (1°C) 75°F Jul (24°C)

Annual Average	53.7°F
	1% below US avg
January Average	33°F (1°C)
July Average	75°F (24°C)
Sunny Days	271 days/yr

Geography

Elevation	3 ft (1 m)
Area	1.3 sq mi (3.5 km²)
Population Density	2,527/sq mi
Coordinates	40.4342°N, 74.1007°W
Timezone	America/New_York
County	Richmond County County
Nearest Airport	Newark Liberty International (EWR) 18 miles away

Precipitation & Snow

Annual Rainfall 52.5"

38% above US avg

Wettest Month (Aug) 4.61"

Driest Month (Feb) 3.15"

Air Quality

AQI Median	39.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	91.0 / 100
Social Vulnerability	61.6 / 100
Community Resilience	68.1 / 100

Hazard Breakdown

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

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

Earthquake History

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

Apr 5, 2024	2024 Tewksbury, New Jersey Earthquake	M4.8	63 km	3 km
Apr 5, 2024	7 km WSW of Gladstone, New Jersey	M3.7	62 km	4 km
Aug 26, 2003	4 km NNW of Milford, New Jersey	M3.1	87 km	3 km
Jan 9, 1992	4 km WNW of Robertsville, New Jersey	M3.1	22 km	8 km
Aug 3, 2025	0 km W of Little Ferry, New Jersey	M3.0	47 km	10 km
Oct 28, 1991	3 km WNW of Stamford, Connecticut	M3.0	83 km	10 km
Feb 3, 2009	1 km ESE of Victory Gardens, New Jersey	M3.0	60 km	0 km
May 24, 2024	6 km E of Califon, New Jersey	M2.9	64 km	7 km
Apr 27, 2024	7 km WSW of Gladstone, New Jersey	M2.9	62 km	5 km
Aug 5, 2025	1 km N of Hillsdale, New Jersey	M2.8	65 km	12 km
Jul 1, 2009	3 km ESE of Pennsville, New Jersey	M2.8	147 km	5 km
Apr 12, 1991	2 km ENE of North Castle, New York	M2.7	88 km	9 km
Jan 25, 2015	4 km ESE of Downingtown, Pennsylvania	M2.6	141 km	2 km
Apr 10, 2024	5 km WSW of Gladstone, New Jersey	M2.6	60 km	9 km
Aug 22, 2000	2 km WSW of Brewster Hill, New York	M2.6	117 km	7 km
Oct 27, 2001	1 km NNW of Manhattan, New York	M2.6	41 km	5 km
Aug 14, 2015	3 km SE of Mendham, New Jersey	M2.6	53 km	8 km
May 1, 2024	1 km NW of Gladstone, New Jersey	M2.6	59 km	5 km
Apr 5, 2024	6 km ESE of Califon, New Jersey	M2.6	63 km	6 km
Jul 5, 1996	2 km NW of Chester Heights, Pennsylvania	M2.6	132 km	18 km

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

Hurricane History

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

Year	Name	Category	Max Wind	Closest
2021	Henri	Category 1	75 mph	288 km
2014	Arthur	Category 1	81 mph	269 km
2012	Sandy	Category 1	92 mph	250 km
2011	Irene	Category 1	75 mph	271 km
1991	Bob	Category 2	109 mph	162 km
1985	Gloria	Category 2	98 mph	64 km

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

Tornado History

213 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 12 fatalities, 132 injuries.

Date	Rating	Distance	Path	Fatalities
Jul 29, 2021	EF3	84 km	3.4 mi	0
Oct 18, 1990	EF3	57 km	0.5 mi	0
Jul 21, 1983	EF3	86 km	0.2 mi	0
Sep 26, 1977	EF3	36 km	5.9 mi	0
May 28, 1973	EF3	53 km	0.4 mi	0
May 28, 1973	EF3	70 km	0.4 mi	0
Jun 24, 1960	EF3	60 km	12.9 mi	0
Apr 1, 2023	EF2	40 km	2.1 mi	0
Apr 1, 2023	EF2	34 km	1.6 mi	0
Apr 1, 2023	EF2	35 km	0.1 mi	0
Feb 21, 2023	EF2	54 km	5.8 mi	0
Jul 29, 2021	EF2	72 km	6.3 mi	0
Jul 29, 2021	EF2	76 km	4.2 mi	0
Aug 4, 2020	EF2	83 km	20.8 mi	0
Aug 8, 2007	EF2	22 km	5.9 mi	0
Jul 12, 2006	EF2	73 km	10.1 mi	0
May 27, 2001	EF2	22 km	1.5 mi	0
Aug 20, 1999	EF2	99 km	0.4 mi	0
Sep 7, 1998	EF2	43 km	0.2 mi	0
May 31, 1998	EF2	86 km	5.6 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	—	94 km
1895	HIGH BRIDGE, NJ	Earthquake	—	—	71 km
1840	PHILADELPHIA, PENNSYLVANIA	Earthquake	—	—	117 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	85 km
1995	GREENWOOD STATE FOREST	21,271	68 km
2007	WARREN GROVE	15,315	85 km
2022	MULLICA RIVER FIRE	13,082	97 km
1999	BASS RIVER	12,129	91 km
2019	SPRING HILL FIRE	8,182	78 km
2023	ALLEN ROAD	6,213	93 km
1992	FORKED RIVER MOUTAIN APR	5,093	66 km
2024	JENNINGS CREEK	5,069	84 km
1992	POWER PLANT	4,928	68 km
1992	UNNAMED	4,470	60 km
2024	TEA TIME HILL	4,444	83 km
2006	UNNAMED	3,780	91 km
2017	PENN SWAMP FIRE	3,587	96 km
2023	JIMMYS WATER HOLE	3,585	53 km
1989	SIMM PLACE	3,262	78 km
2002	UNNAMED	2,824	59 km
2007	ATSION	2,705	95 km
1992	FOUR MILE COLONY	2,647	74 km
1996	UNNAMED	2,625	93 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	33°F (1°C)	3.8 in
February	33°F (1°C)	3.2 in	Coldest, Driest
March	41°F (5°C)	4.1 in
April	51°F (10°C)	4.0 in
May	60°F (16°C)	4.3 in
June	69°F (21°C)	3.5 in
July	75°F (24°C)	4.5 in	Warmest
August	73°F (23°C)	4.6 in	Wettest
September	66°F (19°C)	4.0 in
October	55°F (13°C)	3.6 in
November	46°F (8°C)	4.0 in
December	37°F (3°C)	3.8 in

Port Monmouth has a seasonal temperature swing of 42°F / from 33°F in February to 75°F in July. Total annual precipitation is 47.4 inches, with August being the wettest month (4.6") and February the driest (3.2").

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