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Topstone, CT
Full City Profile · Connecticut · Western Connecticut Planning Region County
3.9
/5.0
B+
Good
94
Population
495/sq mi density
$684,800
Home Value
$953,119 Zillow
50°F
Avg Temperature
275 sunny days/yr
4
Violent Crime/100K
257 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Safety
2.8 / 5.0
4 violent crimes/100K
A+
Education
5.0 / 5.0
100.0% bachelor's degree or higher
Topstone experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 27°F in January while summers reach 72°F in July. The area gets 275 sunny days per year. Annual precipitation totals 48.0 inches. Air quality is rated Good with a median AQI of 39.
Temperature
27°F Jan (-3°C)
72°F Jul (22°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 525 ft (160 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 495/sq mi |
| Coordinates | 41.2963°N, 73.4466°W |
| Timezone | America/New_York |
| County | Western Connecticut Planning Region County |
| Nearest Airport | Hudson Valley Regional (POU) 32 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
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 | — | 62 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 139 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 3.9 in | Coldest |
| February | 29°F (-2°C) | 3.4 in | Driest |
| March | 38°F (3°C) | 4.3 in | |
| April | 48°F (9°C) | 4.5 in | |
| May | 58°F (15°C) | 4.7 in | Wettest |
| June | 67°F (19°C) | 4.0 in | |
| July | 72°F (22°C) | 4.0 in | Warmest |
| August | 71°F (21°C) | 4.1 in | |
| September | 63°F (17°C) | 4.3 in | |
| October | 52°F (11°C) | 4.1 in | |
| November | 43°F (6°C) | 4.5 in | |
| December | 33°F (0°C) | 4.1 in |
Topstone has a seasonal temperature swing of 45°F / from 27°F in January to 72°F in July. Total annual precipitation is 49.7 inches, with May being the wettest month (4.7") and February the driest (3.4").