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Key Biscayne, FL
Full City Profile · Florida · Miami-Dade County County
3.4
/5.0
B
Good
14,560
Population
11,648/sq mi density
$172,604
Median Income
$97,329 per capita
$1,238,700
Home Value
$1,644,950 Zillow
$3,501
Median Rent
38.2% income on rent
79°F
Avg Temperature
330 sunny days/yr
38
Violent Crime/100K
1,321 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$172,604 median income, 2.0% unemployment
C+
Affordability
2.6 / 5.0
$1,238,700 home value, $3,501/mo rent
F
Safety
1.0 / 5.0
38 violent crimes/100K
A+
Education
5.0 / 5.0
74.4% bachelor's degree or higher
Key Biscayne has a warm climate with an average annual temperature of 79°F (26°C). Winters average 70°F in January while summers reach 85°F in July. The area gets 330 sunny days per year. Annual precipitation totals 55.3 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
70°F Jan (21°C)
85°F Jul (29°C)
| Annual Average | 78.7°F |
| 46% above US avg | |
| January Average | 70°F (21°C) |
| July Average | 85°F (29°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 4 ft (1 m) |
| Area | 1.3 sq mi (3.2 km²) |
| Population Density | 11,648/sq mi |
| Coordinates | 25.6907°N, 80.1656°W |
| Timezone | America/New_York |
| County | Miami-Dade County County |
| Nearest Airport | Miami International (MIA) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0383 ppm |
| NO₂ (Nitrogen Dioxide) | 15.8 ppb |
| SO₂ (Sulfur Dioxide) | 0.18 ppb |
| CO (Carbon Monoxide) | 0.31 ppm |
| PM2.5 (Fine Particles) | 7.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.6 / 100 |
| Social Vulnerability | 75.9 / 100 |
| Community Resilience | 42.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very High |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Very High |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | No Rating |
| Lightning | Very High |
| Drought | Relatively Moderate |
| Cold Wave | Very High |
| Landslide | Very Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 70°F (21°C) | 2.2 in | |
| February | 68°F (20°C) | 2.2 in | Coldest |
| March | 71°F (22°C) | 2.4 in | |
| April | 74°F (23°C) | 3.0 in | |
| May | 78°F (25°C) | 6.0 in | |
| June | 81°F (27°C) | 9.3 in | Wettest |
| July | 85°F (29°C) | 6.2 in | Warmest |
| August | 83°F (28°C) | 7.6 in | |
| September | 82°F (28°C) | 8.2 in | |
| October | 79°F (26°C) | 6.2 in | |
| November | 74°F (23°C) | 3.2 in | |
| December | 70°F (21°C) | 1.7 in | Driest |
Key Biscayne has a seasonal temperature swing of 17°F / from 68°F in February to 85°F in July. Total annual precipitation is 58.2 inches, with June being the wettest month (9.3") and December the driest (1.7").