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Plessis, NY
Full City Profile · New York · St. Lawrence County County
3.7
/5.0
B+
Good
173
Population
494/sq mi density
$150,056
Median Income
$63,031 per capita
$131,300
Home Value
$208,997 Zillow
44°F
Avg Temperature
270 sunny days/yr
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$150,056 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$131,300 home value, /mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C
Education
2.3 / 5.0
16.4% bachelor's degree or higher
Plessis has a cool climate with an average annual temperature of 44°F (7°C). Winters average 16°F in January while summers reach 68°F in July. The area gets 270 sunny days per year. Annual precipitation totals 39.6 inches. The area receives 92.4 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
16°F Jan (-9°C)
68°F Jul (20°C)
| Annual Average | 43.5°F |
| 19% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 386 ft (118 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 494/sq mi |
| Coordinates | 44.2735°N, 75.8575°W |
| Timezone | America/New_York |
| County | St. Lawrence County County |
| Nearest Airport | Watertown International (ART) 21 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.9 / 100 |
| Social Vulnerability | 64.7 / 100 |
| Community Resilience | 70.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 3.0 in | Coldest |
| February | 19°F (-7°C) | 2.4 in | Driest |
| March | 30°F (-1°C) | 2.5 in | |
| April | 43°F (6°C) | 3.0 in | |
| May | 55°F (13°C) | 3.2 in | |
| June | 63°F (17°C) | 3.2 in | |
| July | 68°F (20°C) | 3.0 in | Warmest |
| August | 67°F (20°C) | 3.7 in | |
| September | 59°F (15°C) | 4.2 in | Wettest |
| October | 48°F (9°C) | 3.5 in | |
| November | 37°F (3°C) | 4.1 in | |
| December | 24°F (-4°C) | 3.4 in |
Plessis has a seasonal temperature swing of 53°F / from 16°F in January to 68°F in July. Total annual precipitation is 39.1 inches, with September being the wettest month (4.2") and February the driest (2.4").