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Weather & Climate in Allendale, NJ

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

Allendale experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 74°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 48.2 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 297 feet.

Temperature

29°F Jan (-2°C) 74°F Jul (23°C)
Annual Average51.8°F
4% below US avg
January Average29°F (-2°C)
July Average74°F (23°C)
Sunny Days275 days/yr

Geography

Elevation297 ft (91 m)
Area3.1 sq mi (8.1 km²)
Population Density2,200/sq mi
Coordinates41.0327°N, 74.1338°W
TimezoneAmerica/New_York
CountyPassaic County County
Nearest AirportLaguardia (LGA)
22 miles away

Precipitation & Snow

Annual Rainfall 48.2"
27% above US avg
Wettest Month (May) 4.69"
Driest Month (Feb) 3.07"

Air Quality

AQI Median39.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score95.8 / 100
Social Vulnerability76.0 / 100
Community Resilience38.4 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane Relatively Moderate
Earthquake Relatively Moderate
Wildfire Very Low
Flood Relatively High
Hail Very Low
Strong Wind Very High
Heat Wave Relatively Moderate
Winter Weather Very High
Lightning Very High
Ice Storm Relatively Moderate
Drought Relatively Low
Cold Wave Relatively High
Landslide Relatively Low
Coastal Flood Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

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

Apr 5, 2024 2024 Tewksbury, New Jersey Earthquake M4.8 65 km 3 km
Apr 5, 2024 7 km WSW of Gladstone, New Jersey M3.7 64 km 4 km
Aug 26, 2003 4 km NNW of Milford, New Jersey M3.1 95 km 3 km
Jan 9, 1992 4 km WNW of Robertsville, New Jersey M3.1 77 km 8 km
Oct 28, 1991 3 km WNW of Stamford, Connecticut M3.0 47 km 10 km
Aug 3, 2025 0 km W of Little Ferry, New Jersey M3.0 21 km 10 km
Feb 3, 2009 1 km ESE of Victory Gardens, New Jersey M3.0 38 km 0 km
May 24, 2024 6 km E of Califon, New Jersey M2.9 63 km 7 km
Apr 27, 2024 7 km WSW of Gladstone, New Jersey M2.9 64 km 5 km
Aug 5, 2025 1 km N of Hillsdale, New Jersey M2.8 8 km 12 km
Apr 12, 1991 2 km ENE of North Castle, New York M2.7 42 km 9 km
Aug 14, 2014 6 km SW of Deep River Center, Connecticut M2.7 141 km 4 km
Aug 14, 2015 3 km SE of Mendham, New Jersey M2.6 49 km 8 km
May 1, 2024 1 km NW of Gladstone, New Jersey M2.6 57 km 5 km
Oct 27, 2001 1 km NNW of Manhattan, New York M2.6 30 km 5 km
Apr 10, 2024 5 km WSW of Gladstone, New Jersey M2.6 62 km 9 km
Aug 22, 2000 2 km WSW of Brewster Hill, New York M2.6 60 km 7 km
Apr 5, 2024 6 km ESE of Califon, New Jersey M2.6 65 km 6 km
Jan 15, 1992 5 km NNE of Tuxedo Park, New York M2.5 23 km 7 km
Feb 26, 1993 2 km SW of Marlton, New Jersey M2.5 146 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

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

Year Name Category Max Wind Closest
1991 Bob Category 2 109 mph 182 km
1985 Gloria Category 2 98 mph 85 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

215 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 12 fatalities, 133 injuries.

Date Rating Distance Path Fatalities
May 31, 1998 EF3 86 km 20.0 mi 0
Oct 18, 1990 EF3 82 km 0.5 mi 0
Jul 14, 1988 EF3 47 km 7.2 mi 0
Sep 26, 1977 EF3 81 km 5.9 mi 0
Mar 21, 1976 EF3 88 km 0.5 mi 0
May 28, 1973 EF3 40 km 0.4 mi 0
May 28, 1973 EF3 53 km 0.4 mi 0
Apr 1, 2023 EF2 100 km 2.1 mi 0
Apr 1, 2023 EF2 98 km 1.6 mi 0
Feb 21, 2023 EF2 97 km 5.8 mi 0
May 15, 2018 EF2 64 km 1.2 mi 0
Jul 29, 2009 EF2 95 km 4.6 mi 0
Jul 29, 2009 EF2 51 km 7.4 mi 0
Aug 8, 2007 EF2 45 km 5.9 mi 0
Jul 12, 2006 EF2 23 km 10.1 mi 0
May 27, 2001 EF2 78 km 1.5 mi 0
May 18, 2000 EF2 89 km 0.2 mi 0
Sep 7, 1998 EF2 57 km 0.2 mi 0
May 31, 1998 EF2 95 km 3.0 mi 0
May 31, 1998 EF2 95 km 2.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

2 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 — 91 km
1895 HIGH BRIDGE, NJ Earthquake — — 75 km
Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

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

Year Name Acres Burned Distance
1985 UNNAMED 23,000 18 km
2016 16 MILE 7,896 87 km
2024 JENNINGS CREEK 5,069 21 km
2015 ROOSA GAP 2,747 72 km
2008 UNNAMED 2,224 78 km
2016 SAMS POINT FIRE-VERKEERDER FIRE 1,929 74 km
2006 CHERRYTOWN FIRE 943 94 km
1988 UNNAMED 833 23 km
1985 UNNAMED 737 77 km
2016 BEAR TOWN 649 93 km
2016 SHERWOOD 642 17 km
1999 WORTHINGTO 514 82 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 29°F (-2°C) 3.9 in Coldest
February 30°F (-1°C) 3.1 in Driest
March 39°F (4°C) 4.1 in
April 49°F (10°C) 4.4 in
May 60°F (15°C) 4.7 in Wettest
June 69°F (20°C) 4.1 in
July 74°F (23°C) 4.5 in Warmest
August 72°F (22°C) 4.3 in
September 64°F (18°C) 4.6 in
October 53°F (12°C) 3.9 in
November 44°F (7°C) 4.4 in
December 34°F (1°C) 3.8 in

Allendale has a seasonal temperature swing of 45°F / from 29°F in January to 74°F in July. Total annual precipitation is 49.7 inches, with May being the wettest month (4.7") and February the driest (3.1").

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