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Weather & Climate in Long Hill CDP (Southeastern Connecticut County), CT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Long Hill CDP (Southeastern Connecticut County) experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 31°F in January while summers reach 73°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 48.9 inches (wetter than the 38-inch national average). The area receives 24.5 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 25 feet.
Temperature
31°F Jan (-0°C)
73°F Jul (23°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 25 ft (8 m) |
| Area | 1.6 sq mi (4.1 km²) |
| Population Density | 2,787/sq mi |
| Coordinates | 41.3496°N, 72.0505°W |
| Timezone | America/New_York |
| County | Southeastern Connecticut Planning Region County |
| Nearest Airport | Rhode Island Tf Green International (PVD) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.7 / 100 |
| Social Vulnerability | 26.8 / 100 |
| Community Resilience | 86.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
17 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 | 113 km | 10 km |
| Oct 2, 1994 | 1 km NW of Hardwick, Massachusetts | M3.3 | 113 km | 10 km |
| Jun 16, 2000 | 5 km NE of Granville, Massachusetts | M3.3 | 105 km | 10 km |
| Jan 12, 2015 | 0 km NE of Wauregan, Connecticut | M3.3 | 46 km | 5 km |
| Mar 22, 1996 | 2 km NE of Bristol, Rhode Island | M3.1 | 77 km | 12 km |
| Apr 9, 2019 | 63 km SSE of Sagaponack, New York | M3.0 | 106 km | 7 km |
| Oct 28, 1991 | 3 km WNW of Stamford, Connecticut | M3.0 | 132 km | 10 km |
| Mar 10, 1992 | 2 km SW of Napeague, New York | M2.8 | 40 km | 10 km |
| Oct 13, 1999 | 2 km E of Littleton Common, Massachusetts | M2.7 | 143 km | 2 km |
| Oct 11, 1990 | 5 km NNE of The Pinehills, Massachusetts | M2.7 | 139 km | 13 km |
| Apr 12, 1991 | 2 km ENE of North Castle, New York | M2.7 | 136 km | 9 km |
| Aug 14, 2014 | 6 km SW of Deep River Center, Connecticut | M2.7 | 37 km | 4 km |
| Jan 13, 2015 | 2 km E of Wauregan, Connecticut | M2.6 | 46 km | 9 km |
| Apr 22, 1996 | 3 km NE of North Westport, Massachusetts | M2.6 | 90 km | 5 km |
| Aug 22, 2000 | 2 km WSW of Brewster Hill, New York | M2.6 | 132 km | 7 km |
| Jun 7, 2002 | 3 km NNW of Hopedale, Massachusetts | M2.5 | 99 km | 5 km |
| Jan 23, 1990 | 3 km NNW of Boxborough, Massachusetts | M2.5 | 137 km | 5 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 |
| 2021 | Henri | Category 1 | 75 mph | 234 km |
| 2014 | Arthur | Category 1 | 75 mph | 236 km |
| 1996 | Edouard | Category 1 | 92 mph | 283 km |
| 1991 | Bob | Category 2 | 109 mph | 41 km |
| 1985 | Gloria | Category 1 | 86 mph | 87 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
163 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 4 fatalities, 730 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 10, 1989 | EF4 | 71 km | 3.0 mi | 0 |
| Oct 3, 1979 | EF4 | 78 km | 11.3 mi | 3 |
| Jul 29, 1971 | EF3 | 86 km | 0.1 mi | 0 |
| May 24, 1962 | EF3 | 92 km | 11.6 mi | 1 |
| May 10, 1954 | EF3 | 72 km | 0.3 mi | 0 |
| Jun 9, 1953 | EF3 | 94 km | 28.0 mi | 0 |
| Aug 21, 1951 | EF3 | 45 km | 0.1 mi | 0 |
| Aug 18, 2023 | EF2 | 64 km | 9.1 mi | 0 |
| Aug 8, 1999 | EF2 | 55 km | 4.0 mi | 0 |
| Jul 10, 1989 | EF2 | 85 km | 0.2 mi | 0 |
| Jul 10, 1989 | EF2 | 93 km | 5.0 mi | 0 |
| Aug 7, 1986 | EF2 | 68 km | 4.0 mi | 0 |
| Jul 5, 1984 | EF2 | 83 km | 3.0 mi | 0 |
| Jul 24, 1975 | EF2 | 98 km | 0.3 mi | 0 |
| Sep 18, 1973 | EF2 | 76 km | 0.1 mi | 0 |
| Sep 6, 1973 | EF2 | 64 km | 3.3 mi | 0 |
| Aug 31, 1973 | EF2 | 71 km | 0.1 mi | 0 |
| Jun 12, 1973 | EF2 | 94 km | 1.5 mi | 0 |
| Aug 28, 1970 | EF2 | 100 km | 1.0 mi | 0 |
| Aug 19, 1965 | EF2 | 77 km | 6.6 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 | — | 107 km |
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: CRESCENT BOW FIRE (1,068 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | CRESCENT BOW FIRE | 1,068 | 83 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 4.3 in | |
| February | 29°F (-2°C) | 3.6 in | Coldest |
| March | 37°F (3°C) | 4.4 in | |
| April | 47°F (8°C) | 4.3 in | |
| May | 57°F (14°C) | 3.9 in | |
| June | 65°F (18°C) | 3.7 in | |
| July | 73°F (23°C) | 3.5 in | Warmest, Driest |
| August | 71°F (22°C) | 4.1 in | |
| September | 64°F (18°C) | 4.0 in | |
| October | 53°F (12°C) | 4.1 in | |
| November | 44°F (7°C) | 4.7 in | Wettest |
| December | 34°F (1°C) | 4.4 in |
Long Hill CDP (Southeastern Connecticut County) has a seasonal temperature swing of 44°F / from 29°F in February to 73°F in July. Total annual precipitation is 48.9 inches, with November being the wettest month (4.7") and July the driest (3.5").