Cornwall, CT
Full City Profile · Connecticut · Northwest Hills Planning Region County
5.0
/5.0
A+
Excellent
65
Population
116/sq mi density
$134,167
Median Income
$155,657 per capita
48°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Economy
5.0 / 5.0
$134,167 median income, 0.0% unemployment
A+
Education
5.0 / 5.0
70.8% bachelor's degree or higher
Cornwall experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 25°F in January while summers reach 71°F in July. Annual precipitation totals 46.9 inches. The area receives 74.9 inches of snow annually.
Temperature
25°F Jan (-4°C)
71°F Jul (22°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 704 ft (215 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 116/sq mi |
| Coordinates | 41.8443°N, 73.3327°W |
| Timezone | America/New_York |
| County | Northwest Hills Planning Region County |
| Nearest Airport | Hudson Valley Regional (POU) 32 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 79.6 / 100 |
| Social Vulnerability | 12.8 / 100 |
| Community Resilience | 76.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
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 | - | 118 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 3.0 in | Coldest |
| February | 27°F (-3°C) | 2.6 in | Driest |
| March | 35°F (2°C) | 3.4 in | |
| April | 47°F (8°C) | 3.4 in | |
| May | 58°F (14°C) | 3.9 in | |
| June | 66°F (19°C) | 4.8 in | Wettest |
| July | 71°F (22°C) | 4.8 in | Warmest |
| August | 69°F (21°C) | 4.4 in | |
| September | 62°F (17°C) | 4.7 in | |
| October | 51°F (10°C) | 4.7 in | |
| November | 40°F (4°C) | 3.5 in | |
| December | 30°F (-1°C) | 3.8 in |
Cornwall has a seasonal temperature swing of 47°F / from 25°F in January to 71°F in July. Total annual precipitation is 46.9 inches, with June being the wettest month (4.8") and February the driest (2.6").