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Weather & Climate in Oakville, CT

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

Oakville experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 24°F in January while summers reach 70°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 54.3 inches (wetter than the 38-inch national average). The area receives 59.1 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 425 feet.

Temperature

24°F Jan (-4°C) 70°F Jul (21°C)
Annual Average47.3°F
12% below US avg
January Average24°F (-4°C)
July Average70°F (21°C)
Sunny Days271 days/yr

Geography

Elevation425 ft (130 m)
Area4.0 sq mi (10.3 km²)
Population Density2,320/sq mi
Coordinates41.5890°N, 73.0905°W
TimezoneAmerica/New_York
CountyNaugatuck Valley Planning Region County
Nearest AirportBradley International (BDL)
32 miles away

Precipitation & Snow

Annual Rainfall 54.3"
43% above US avg
Snowfall 59.1"
Wettest Month (May) 4.41"
Driest Month (Feb) 3.39"

Air Quality

AQI Median39.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score93.2 / 100
Social Vulnerability35.7 / 100
Community Resilience77.2 / 100

Hazard Breakdown

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

Earthquake History

27 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.

Oct 2, 1994 6 km W of Hardwick, Massachusetts M3.7 108 km 10 km
Jan 12, 2015 0 km NE of Wauregan, Connecticut M3.3 100 km 5 km
Jun 16, 2000 5 km NE of Granville, Massachusetts M3.3 61 km 10 km
Oct 2, 1994 1 km NW of Hardwick, Massachusetts M3.3 112 km 10 km
Dec 13, 2009 15 km N of Medusa, New York M3.2 138 km 10 km
Jul 24, 2007 12 km SSW of Altamont, New York M3.1 141 km 15 km
May 18, 2009 15 km N of Medusa, New York M3.1 138 km 9 km
Oct 28, 1991 3 km WNW of Stamford, Connecticut M3.0 71 km 10 km
Aug 3, 2025 0 km W of Little Ferry, New Jersey M3.0 115 km 10 km
Feb 3, 2009 1 km ESE of Victory Gardens, New Jersey M3.0 144 km 0 km
Oct 21, 2009 15 km N of Medusa, New York M2.9 138 km 7 km
Aug 5, 2025 1 km N of Hillsdale, New Jersey M2.8 102 km 12 km
Mar 10, 1992 2 km SW of Napeague, New York M2.8 107 km 10 km
Aug 27, 2011 5 km WSW of Altamont, New York M2.8 147 km 22 km
Mar 22, 2009 9 km SW of Altamont, New York M2.8 144 km 16 km
Apr 12, 1991 2 km ENE of North Castle, New York M2.7 68 km 9 km
Aug 25, 2011 5 km WSW of Altamont, New York M2.7 147 km 18 km
Feb 18, 2009 15 km N of Medusa, New York M2.7 137 km 9 km
Aug 14, 2014 6 km SW of Deep River Center, Connecticut M2.7 56 km 4 km
Feb 20, 2009 15 km SSW of Altamont, New York M2.7 137 km 8 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 132 km
1985 Gloria Category 1 86 mph 42 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

245 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 25 fatalities, 1,013 injuries.

Date Rating Distance Path Fatalities
May 29, 1995 EF4 74 km 11.5 mi 3
Jul 10, 1989 EF4 28 km 3.0 mi 0
Oct 3, 1979 EF4 48 km 11.3 mi 3
Aug 28, 1973 EF4 96 km 9.8 mi 4
Jun 1, 2011 EF3 63 km 37.6 mi 3
Jun 16, 1974 EF3 96 km 49.1 mi 0
Sep 13, 1971 EF3 89 km 0.5 mi 0
Jul 29, 1971 EF3 6 km 0.1 mi 0
May 24, 1962 EF3 5 km 11.6 mi 1
May 10, 1954 EF3 63 km 0.3 mi 0
Aug 21, 1951 EF3 49 km 0.1 mi 0
May 15, 2018 EF2 50 km 1.2 mi 0
Jul 12, 2006 EF2 87 km 10.1 mi 0
Jul 21, 2003 EF2 100 km 1.5 mi 0
Jun 23, 2001 EF2 24 km 0.5 mi 0
May 18, 2000 EF2 77 km 0.2 mi 0
Aug 8, 1999 EF2 81 km 4.0 mi 0
Jul 3, 1997 EF2 66 km 3.7 mi 0
Jul 3, 1997 EF2 94 km 1.5 mi 0
Jul 3, 1997 EF2 66 km 4.5 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

1 tsunami 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 — 88 km
Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

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

Year Name Acres Burned Distance
1985 UNNAMED 23,000 96 km
2008 UNNAMED 2,224 100 km
2012 CRESCENT BOW FIRE 1,068 81 km
1988 UNNAMED 833 95 km
2016 SHERWOOD 642 96 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-4°C) 3.7 in Coldest
February 28°F (-3°C) 3.4 in Driest
March 37°F (3°C) 4.0 in
April 47°F (8°C) 4.3 in
May 58°F (14°C) 4.4 in Wettest
June 66°F (19°C) 4.0 in
July 70°F (21°C) 4.1 in Warmest
August 70°F (21°C) 4.0 in
September 62°F (17°C) 4.1 in
October 51°F (11°C) 4.0 in
November 42°F (5°C) 4.4 in
December 31°F (-1°C) 4.1 in

Oakville has a seasonal temperature swing of 46°F / from 24°F in January to 70°F in July. Total annual precipitation is 48.4 inches, with May being the wettest month (4.4") and February the driest (3.4").

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