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Dayville, CT
Full City Profile · Connecticut · Northeastern Connecticut Planning Region County
2.8
/5.0
C+
Fair
379
Population
408/sq mi density
$66,000
Median Income
$37,098 per capita
$244,500
Home Value
$336,876 Zillow
48°F
Avg Temperature
271 sunny days/yr
307
Violent Crime/100K
1,738 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$66,000 median income, 16.0% unemployment
A+
Affordability
4.6 / 5.0
$244,500 home value, /mo rent
F
Safety
1.0 / 5.0
307 violent crimes/100K
C
Education
2.4 / 5.0
17.2% bachelor's degree or higher
Dayville 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. The area gets 271 sunny days per year. Annual precipitation totals 50.1 inches. The area receives 38.5 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
25°F Jan (-4°C)
71°F Jul (22°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 253 ft (77 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 408/sq mi |
| Coordinates | 41.8442°N, 71.8824°W |
| Timezone | America/New_York |
| County | Northeastern Connecticut Planning Region County |
| Nearest Airport | Rhode Island Tf Green International (PVD) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 62.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 61.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | No Rating |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 4.0 in | Coldest |
| February | 26°F (-4°C) | 3.5 in | Driest |
| March | 35°F (1°C) | 4.0 in | |
| April | 45°F (7°C) | 4.2 in | |
| May | 55°F (13°C) | 4.0 in | |
| June | 64°F (18°C) | 4.0 in | |
| July | 71°F (22°C) | 3.9 in | Warmest |
| August | 70°F (21°C) | 4.0 in | |
| September | 62°F (17°C) | 3.9 in | |
| October | 51°F (10°C) | 4.1 in | |
| November | 42°F (5°C) | 4.6 in | Wettest |
| December | 31°F (-1°C) | 4.3 in |
Dayville has a seasonal temperature swing of 46°F / from 25°F in January to 71°F in July. Total annual precipitation is 48.4 inches, with November being the wettest month (4.6") and February the driest (3.5").