Key Biscayne Weather Forecast 15 Days, Weather in Key Biscayne Today
Current weather conditions and 15 day weather forecast for Key Biscayne, Florida, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Key Biscayne
| 19 December 2025 Friday 23.9 ° C / 75°F  Clear |
Feels Like : 26.3 ° C / 79.3°F Humidity : % 94 Pressure : 1016 mb Wind Speed : 10.4 kmph / 6.5 miles from SW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 25 |
15 day weather forecast for Key Biscayne, FL, USA
Weather Forecast for next 15 Days for Key Biscayne including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Key Biscayne, Florida state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 December 2025 Friday | Sunny |
23.9 ° C (75°F) |
28 ° C (82.4°F) |
25 ° C (77°F) |
% 89 | 0% | 0.9 | Sunrise:07:02 AM Sunset: 05:34 PM |
Moonrise:06:49 AM Moonset: 05:10 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Fog |
22.4 ° C (72.3°F) |
23.9 ° C (75°F) |
23.3 ° C (73.9°F) |
% 96 | 0% | 1 | Sunrise:07:02 AM Sunset: 05:35 PM |
Moonrise:07:41 AM Moonset: 06:04 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Fog |
21.7 ° C (71.1°F) |
23.8 ° C (74.8°F) |
22.6 ° C (72.7°F) |
% 92 | 0% | 1.1 | Sunrise:07:03 AM Sunset: 05:35 PM |
Moonrise:08:29 AM Moonset: 07:01 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Patchy rain nearby |
22.9 ° C (73.2°F) |
24.3 ° C (75.8°F) |
23.6 ° C (74.5°F) |
% 64 | 83% | 1.1 | Sunrise:07:03 AM Sunset: 05:36 PM |
Moonrise:09:13 AM Moonset: 07:59 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Patchy rain nearby |
22.3 ° C (72.1°F) |
23.4 ° C (74°F) |
22.9 ° C (73.2°F) |
% 68 | 82% | 0 | Sunrise:07:04 AM Sunset: 05:36 PM |
Moonrise:09:52 AM Moonset: 08:57 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Patchy rain nearby |
22.4 ° C (72.3°F) |
23.7 ° C (74.6°F) |
23.1 ° C (73.6°F) |
% 65 | 86% | 5 | Sunrise:07:04 AM Sunset: 05:37 PM |
Moonrise:10:27 AM Moonset: 09:54 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Patchy rain nearby |
22.6 ° C (72.7°F) |
23.4 ° C (74.1°F) |
23 ° C (73.4°F) |
% 63 | 89% | 5 | Sunrise:07:05 AM Sunset: 05:37 PM |
Moonrise:11:00 AM Moonset: 10:51 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
22.6 ° C (72.6°F) |
23.7 ° C (74.7°F) |
23.1 ° C (73.5°F) |
% 59 | 0% | 6 | Sunrise:07:05 AM Sunset: 05:38 PM |
Moonrise:11:31 AM Moonset: 11:48 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
21.6 ° C (70.9°F) |
23.8 ° C (74.8°F) |
22.8 ° C (73°F) |
% 66 | 86% | 5 | Sunrise:07:06 AM Sunset: 05:38 PM |
Moonrise:12:03 PM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy rain nearby |
22.6 ° C (72.7°F) |
24.2 ° C (75.6°F) |
23.3 ° C (74°F) |
% 61 | 85% | 5 | Sunrise:07:06 AM Sunset: 05:39 PM |
Moonrise:12:37 PM Moonset: 12:47 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Patchy rain nearby |
23 ° C (73.5°F) |
23.7 ° C (74.6°F) |
23.4 ° C (74.1°F) |
% 74 | 86% | 5 | Sunrise:07:06 AM Sunset: 05:40 PM |
Moonrise:01:15 PM Moonset: 01:50 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Patchy rain nearby |
23.2 ° C (73.7°F) |
24.3 ° C (75.7°F) |
23.7 ° C (74.6°F) |
% 68 | 0% | 5 | Sunrise:07:07 AM Sunset: 05:40 PM |
Moonrise:01:58 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Patchy rain nearby |
23 ° C (73.4°F) |
24.3 ° C (75.7°F) |
23.6 ° C (74.5°F) |
% 70 | 0% | 5 | Sunrise:07:07 AM Sunset: 05:41 PM |
Moonrise:02:49 PM Moonset: 04:06 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Sunny |
22.7 ° C (72.8°F) |
23.9 ° C (75.1°F) |
23.4 ° C (74.1°F) |
% 67 | 0% | 6 | Sunrise:07:07 AM Sunset: 05:42 PM |
Moonrise:03:49 PM Moonset: 05:18 AM Moon Phase ( Waxing Gibbous ) |
|
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