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Thiells, NY
Full City Profile · New York · Rockland County County
3.7
/5.0
B+
Good
4,539
Population
2,494/sq mi density
$126,250
Median Income
$55,304 per capita
$532,200
Home Value
$725,490 Zillow
$1,739
Median Rent
41.0% income on rent
52°F
Avg Temperature
275 sunny days/yr
224
Violent Crime/100K
785 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$126,250 median income, 1.9% unemployment
A
Affordability
4.3 / 5.0
$532,200 home value, $1,739/mo rent
F
Safety
1.0 / 5.0
224 violent crimes/100K
A
Education
4.5 / 5.0
43.6% bachelor's degree or higher
Thiells experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 48.2 inches. Air quality is rated Good with a median AQI of 36.
Temperature
29°F Jan (-2°C)
74°F Jul (23°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 275 ft (84 m) |
| Area | 1.9 sq mi (4.8 km²) |
| Population Density | 2,494/sq mi |
| Coordinates | 41.2044°N, 74.0127°W |
| Timezone | America/New_York |
| County | Rockland County County |
| Nearest Airport | New York Stewart International (SWF) 21 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0417 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.4 / 100 |
| Social Vulnerability | 68.2 / 100 |
| Community Resilience | 69.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
| 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 | — | 89 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 94 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 3.9 in | |
| February | 28°F (-2°C) | 3.2 in | Coldest, Driest |
| March | 37°F (3°C) | 4.2 in | |
| April | 47°F (9°C) | 4.5 in | |
| May | 58°F (14°C) | 4.8 in | Wettest |
| June | 66°F (19°C) | 4.3 in | |
| July | 74°F (23°C) | 4.6 in | Warmest |
| August | 70°F (21°C) | 4.3 in | |
| September | 62°F (17°C) | 4.7 in | |
| October | 51°F (11°C) | 4.1 in | |
| November | 42°F (6°C) | 4.5 in | |
| December | 31°F (-0°C) | 3.9 in |
Thiells has a seasonal temperature swing of 46°F / from 28°F in February to 74°F in July. Total annual precipitation is 51.0 inches, with May being the wettest month (4.8") and February the driest (3.2").