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Mill Plain, CT
Full City Profile · Connecticut · Greater Bridgeport Planning Region County
3.5
/5.0
B+
Good
1,980
Population
4,041/sq mi density
$190,250
Median Income
$78,245 per capita
$806,600
Home Value
$353,183 Zillow
53°F
Avg Temperature
275 sunny days/yr
905
Violent Crime/100K
2,899 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$190,250 median income, 12.9% unemployment
A
Affordability
4.3 / 5.0
$806,600 home value, /mo rent
F
Safety
1.0 / 5.0
905 violent crimes/100K (138% above avg)
A+
Education
5.0 / 5.0
74.5% bachelor's degree or higher
Mill Plain experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 44.1 inches. The area receives 33.6 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
31°F Jan (-0°C)
76°F Jul (24°C)
| Annual Average | 53.4°F |
| 1% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 12 ft (4 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 4,041/sq mi |
| Coordinates | 41.1547°N, 73.2683°W |
| Timezone | America/New_York |
| County | Greater Bridgeport Planning Region County |
| Nearest Airport | Laguardia (LGA) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.8 / 100 |
| Social Vulnerability | 45.3 / 100 |
| Community Resilience | 59.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Very High |
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 | — | 42 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 146 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 3.7 in | |
| February | 31°F (-0°C) | 3.2 in | Coldest, Driest |
| March | 39°F (4°C) | 4.2 in | |
| April | 49°F (9°C) | 4.3 in | Wettest |
| May | 59°F (15°C) | 4.3 in | |
| June | 68°F (20°C) | 3.7 in | |
| July | 76°F (24°C) | 3.7 in | Warmest |
| August | 72°F (22°C) | 3.9 in | |
| September | 65°F (18°C) | 3.9 in | |
| October | 54°F (12°C) | 3.8 in | |
| November | 45°F (7°C) | 4.2 in | |
| December | 35°F (1°C) | 4.0 in |
Mill Plain has a seasonal temperature swing of 45°F / from 31°F in February to 76°F in July. Total annual precipitation is 46.9 inches, with April being the wettest month (4.3") and February the driest (3.2").