Key Biscayne, FL Weather
Key Biscayne, FL climate is hot during summer when temperatures tend to be in the 80's and mild during winter when temperatures tend to be in the 60's.
The warmest month of the year is August with an average maximum temperature of 87.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 62.60 degrees Fahrenheit.
Temperature variations between night and day tend to be small during summer with a difference that can reach 9 degrees Fahrenheit, and fairly limited during winter with an average difference of 11 degrees Fahrenheit.
The annual average precipitation at Key Biscayne is 46.60 Inches. Summer months tend to be wetter than winter months. The wettest month of the year is June with an average rainfall of 6.90 Inches.
Weather Data
Current Conditions
|
Fair, 76°F | Humidity: 88% | Dewpoint: 72°F |
| Wind Speed: CALM | Heat Index: 76°F | ||
| Barometer: 30.02 in. | Wind Chill: 76°F |
Weather Forecast
 | Tonight: Partly cloudy. Patchy fog with areas of fog late in the night. Lows 70 to 74. Light winds. | |
| Lo: 73°F | ||
 | Hi: 85°F | Monday: Partly sunny with a 20 percent chance of showers. Highs in the mid 80s. Light winds becoming southeast 5 to 10 mph in the afternoon. |
| Lo: 70°F | ||
| Hi: 85°F | Tuesday: Partly sunny with a 30 percent chance of showers. Highs in the mid 80s. Light winds becoming east around 10 mph in the afternoon. |
| Lo: 72°F | ||
| Hi: 81°F | Wednesday: Partly sunny with a 40 percent chance of showers. Highs in the lower 80s. |
| Lo: 69°F | ||
| Hi: 81°F | Thanksgiving day: Partly sunny with a 20 percent chance of showers. Highs in the lower 80s. |
| Lo: 61°F | ||
 | Hi: 75°F | Friday: Partly sunny. Highs in the mid 70s. |
| Lo: 51°F | ||
 | Hi: 71°F | Saturday: Mostly sunny. Highs in the lower 70s. |
| Lo: 55°F |
Moon, Sunrise and Sunset
 |
Moon Phase: Waxing Crescent Moon | Civil Twilight: 6:18 AM EST |
Sunrise: 6:42 AM EST |
| Sunset: 5:29 PM EST |
Civil Twilight: 5:54 PM EST |
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 73.2 | 73.4 | 75.3 | 78.5 | 82.1 | 85.5 | 87.0 | 87.2 | 85.9 | 82.5 | 78.4 | 74.8 | 80.3 |
| Mean °F | 67.9 | 68.2 | 70.9 | 74.2 | 78.0 | 81.1 | 82.7 | 82.8 | 81.8 | 78.5 | 74.3 | 69.9 | 75.9 |
| Min °F | 62.6 | 63.0 | 66.4 | 69.8 | 73.8 | 76.7 | 78.3 | 78.3 | 77.6 | 74.5 | 70.1 | 65.0 | 71.3 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 2.44 | 2.14 | 2.20 | 2.81 | 4.90 | 6.90 | 3.63 | 5.44 | 6.31 | 4.53 | 3.32 | 1.98 | 46.60 |
