South Wilton, CT
Full City Profile · Connecticut · Western Connecticut Planning Region County
4.6
/5.0
A+
Excellent
1,453
Population
1,297/sq mi density
$157,446
Median Income
$108,946 per capita
$780,800
Home Value
$1,317,248 Zillow
53°F
Avg Temperature
A+
Overall
4.6 / 5.0
Strong
A+
Economy
4.8 / 5.0
$157,446 median income, 3.3% unemployment
B+
Affordability
3.9 / 5.0
$780,800 home value, /mo rent
A+
Education
5.0 / 5.0
67.6% bachelor's degree or higher
South Wilton experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 75°F in July. Annual precipitation totals 51.6 inches. The area receives 34.0 inches of snow annually.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.6°F |
| 3% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 132 ft (40 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 1,297/sq mi |
| Coordinates | 41.1723°N, 73.4170°W |
| Timezone | America/New_York |
| County | Western Connecticut Planning Region County |
| Nearest Airport | Laguardia (LGA) 36 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 96.3 / 100 |
| Social Vulnerability | 21.4 / 100 |
| Community Resilience | 62.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively High |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
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 | - | 49 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 135 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 4.3 in | Coldest |
| February | 32°F (0°C) | 3.1 in | Driest |
| March | 40°F (4°C) | 4.7 in | |
| April | 51°F (11°C) | 4.4 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 69°F (21°C) | 4.9 in | |
| July | 75°F (24°C) | 3.8 in | Warmest |
| August | 73°F (23°C) | 3.8 in | |
| September | 66°F (19°C) | 5.2 in | Wettest |
| October | 55°F (13°C) | 4.6 in | |
| November | 44°F (7°C) | 4.2 in | |
| December | 35°F (2°C) | 4.4 in |
South Wilton has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 51.6 inches, with September being the wettest month (5.2") and February the driest (3.1").