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Weather & Climate in Richwood, NJ

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

Richwood 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 297 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 138 feet.

Temperature

33°F Jan (1°C) 77°F Jul (25°C)
Annual Average54.9°F
2% above US avg
January Average33°F (1°C)
July Average77°F (25°C)
Sunny Days297 days/yr

Geography

Elevation138 ft (42 m)
Area8.9 sq mi (22.9 km²)
Population Density390/sq mi
Coordinates39.7160°N, 75.1725°W
TimezoneAmerica/New_York
CountyGloucester County County
Nearest AirportPhiladelphia International (PHL)
11 miles away

Precipitation & Snow

Wettest Month (Jul) 4.37"
Driest Month (Feb) 2.87"

Air Quality

AQI Median39.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score86.6 / 100
Social Vulnerability16.0 / 100
Community Resilience85.7 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane Relatively Moderate
Earthquake Relatively Low
Wildfire Relatively Low
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively High
Heat Wave Relatively Moderate
Winter Weather Very High
Lightning Relatively High
Ice Storm Relatively High
Drought Relatively Moderate
Cold Wave Relatively Moderate
Landslide Very Low
Coastal Flood Relatively 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 M4.8 115 km 3 km
Jan 16, 1994 2 km W of Sinking Spring, Pennsylvania M4.6 100 km 5 km
Jan 16, 1994 0 km E of Sinking Spring, Pennsylvania M4.2 98 km 5 km
Apr 5, 2024 7 km WSW of Gladstone, New Jersey M3.7 114 km 4 km
Oct 23, 1990 3 km W of Hancocks Bridge, New Jersey M3.2 37 km 10 km
Aug 26, 2003 4 km NNW of Milford, New Jersey M3.1 99 km 3 km
Jan 9, 1992 4 km WNW of Robertsville, New Jersey M3.1 101 km 8 km
Nov 14, 1997 0 km S of Rothsville, Pennsylvania M3.0 104 km 5 km
Feb 3, 2009 1 km ESE of Victory Gardens, New Jersey M3.0 140 km 0 km
Apr 27, 2024 7 km WSW of Gladstone, New Jersey M2.9 114 km 5 km
May 24, 2024 6 km E of Califon, New Jersey M2.9 116 km 7 km
Jan 16, 1994 0 km SSE of Sinking Spring, Pennsylvania M2.9 98 km 5 km
May 10, 1993 1 km NW of Whitfield, Pennsylvania M2.8 101 km 5 km
Jul 1, 2009 3 km ESE of Pennsville, New Jersey M2.8 28 km 5 km
Mar 11, 1995 0 km ENE of Landisville, Pennsylvania M2.7 113 km 5 km
Oct 28, 1994 1 km E of Mount Vernon, Maryland M2.7 131 km —
Jan 25, 2015 4 km ESE of Downingtown, Pennsylvania M2.6 52 km 2 km
Oct 28, 1996 2 km W of Reinholds, Pennsylvania M2.6 103 km 5 km
Jan 18, 1994 3 km SE of Clay, Pennsylvania M2.6 104 km 5 km
Apr 5, 2024 6 km ESE of Califon, New Jersey M2.6 114 km 6 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 3.

Year Name Category Max Wind Closest
2014 Arthur Category 1 81 mph 277 km
2012 Sandy Category 2 92 mph 232 km
2011 Irene Category 1 75 mph 180 km
1991 Bob Category 3 109 mph 208 km
1986 Charley Category 1 75 mph 258 km
1985 Gloria Category 2 98 mph 138 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

318 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 10 fatalities, 259 injuries.

Date Rating Distance Path Fatalities
Sep 1, 2021 EF3 8 km 12.4 mi 0
Jul 29, 2021 EF3 48 km 3.4 mi 0
Jul 27, 1994 EF3 52 km 4.0 mi 0
Jul 27, 1994 EF3 64 km 2.0 mi 3
Oct 18, 1990 EF3 92 km 0.5 mi 0
Jul 21, 1983 EF3 77 km 0.2 mi 0
Sep 26, 1977 EF3 92 km 5.9 mi 0
Apr 28, 1961 EF3 34 km 0.3 mi 0
Jun 24, 1960 EF3 71 km 12.9 mi 0
Mar 22, 1955 EF3 48 km 9.6 mi 1
Nov 4, 1950 EF3 97 km 15.9 mi 0
Apr 1, 2023 EF2 91 km 1.6 mi 0
Apr 1, 2023 EF2 82 km 2.1 mi 0
Feb 21, 2023 EF2 74 km 5.8 mi 0
Sep 1, 2021 EF2 69 km 5.9 mi 0
Sep 1, 2021 EF2 44 km 8.3 mi 1
Jul 29, 2021 EF2 73 km 6.3 mi 0
Jul 29, 2021 EF2 84 km 4.2 mi 0
Aug 4, 2020 EF2 45 km 20.8 mi 0
Aug 4, 2020 EF2 74 km 35.8 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 — — 109 km
1840 PHILADELPHIA, PENNSYLVANIA Earthquake — — 10 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 78 km
2007 WARREN GROVE 15,315 71 km
2022 MULLICA RIVER FIRE 13,082 42 km
1999 BASS RIVER 12,129 62 km
2019 SPRING HILL FIRE 8,182 62 km
2023 ALLEN ROAD 6,213 60 km
1992 FORKED RIVER MOUTAIN APR 5,093 78 km
1992 POWER PLANT 4,928 81 km
1992 UNNAMED 4,470 65 km
2024 TEA TIME HILL 4,444 50 km
2006 UNNAMED 3,780 47 km
2017 PENN SWAMP FIRE 3,587 46 km
2023 JIMMYS WATER HOLE 3,585 75 km
1989 SIMM PLACE 3,262 64 km
2002 UNNAMED 2,824 66 km
2007 ATSION 2,705 39 km
1992 FOUR MILE COLONY 2,647 56 km
1996 UNNAMED 2,625 53 km
2010 FORT DIX RANGE 1-14 2,615 64 km
1990 UNNAMED 2,367 34 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 33°F (1°C) 3.6 in Coldest
February 34°F (1°C) 2.9 in Driest
March 42°F (6°C) 4.0 in
April 52°F (11°C) 3.7 in
May 62°F (17°C) 4.1 in
June 71°F (22°C) 3.5 in
July 77°F (25°C) 4.4 in Warmest, Wettest
August 74°F (24°C) 4.1 in
September 67°F (20°C) 3.9 in
October 56°F (13°C) 3.1 in
November 46°F (8°C) 3.4 in
December 37°F (3°C) 3.5 in

Richwood has a seasonal temperature swing of 44°F / from 33°F in January to 77°F in July. Total annual precipitation is 44.3 inches, with July being the wettest month (4.4") and February the driest (2.9").

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