Weather forecast for 10 daysKey Colony Beach, FL

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 84°F
  • 79°F
Scattered Thunderstorms / Wind
Scattered Thunderstorms / Wind
  • Precip. probability: 53%
  • Precipitation: 0.75"
  • Wind: 22mphNE 42°
  • Humidity: 82%
  • UV index: 7
  • Sunrise: 7:23 am EDT
  • Sunset: 6:54 pm EDT
  • ▼
Tomorrow, scattered thunderstorms will occur, and the winds will be noticeably stronger as well.
The chance of rainfall is high, and precipitation will be moderate. The day will observe a moderate high of a warm 84.2°F, subtly differing from a low of a temperate 78.8°F.
The maximum heat index, which combines relative humidity and air temperature, is calculated to be a steamy 95°F. Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Tomorrow, the forecasted peak temperature is expected to mirror October's average high of 82.2°F.
Sunrise will be at 7:23 am and sunset at 6:54 pm; tomorrow's daylight will last for 11h and 31min.

10-day overview

Daily temperatures

Warmest period: tomorrow - Tuesday 84°C.
Coldest period: Wednesday - Monday 82°C.

Chance of precipitation

Highest chance: today 83%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 77°F
Rain
Rain
  • Precip. probability: 83%
  • Precipitation: 0.2"
  • Wind: 18mphNNE 22°
  • Humidity: 88%
  • UV index: 0
  • Sunrise: 7:23 am EDT
  • Sunset: 6:55 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 84°F
  • 79°F
Scattered Thunderstorms / Wind
Scattered Thunderstorms / Wind
  • Precip. probability: 53%
  • Precipitation: 0.75"
  • Wind: 22mphNE 42°
  • Humidity: 82%
  • UV index: 7
  • Sunrise: 7:23 am EDT
  • Sunset: 6:54 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 84°F
  • 75°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 22mphNE 53°
  • Humidity: 70%
  • UV index: 9
  • Sunrise: 7:24 am EDT
  • Sunset: 6:53 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 84°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 19mphNE 42°
  • Humidity: 71%
  • UV index: 9
  • Sunrise: 7:24 am EDT
  • Sunset: 6:53 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 82°F
  • 77°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 12%
  • Precipitation: 0"
  • Wind: 16mphNE 35°
  • Humidity: 68%
  • UV index: 8
  • Sunrise: 7:25 am EDT
  • Sunset: 6:52 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 22%
  • Precipitation: 0"
  • Wind: 14mphNNE 33°
  • Humidity: 65%
  • UV index: 8
  • Sunrise: 7:25 am EDT
  • Sunset: 6:51 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0.04"
  • Wind: 14mphNE 38°
  • Humidity: 68%
  • UV index: 8
  • Sunrise: 7:26 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 82°F
  • 75°F
PM Showers
PM Showers
  • Precip. probability: 41%
  • Precipitation: 0.2"
  • Wind: 16mphNNE 31°
  • Humidity: 70%
  • UV index: 8
  • Sunrise: 7:26 am EDT
  • Sunset: 6:49 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 82°F
  • 75°F
Showers
Showers
  • Precip. probability: 39%
  • Precipitation: 0.24"
  • Wind: 19mphNNE 30°
  • Humidity: 74%
  • UV index: 8
  • Sunrise: 7:27 am EDT
  • Sunset: 6:48 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0"
  • Wind: 16mphNNE 19°
  • Humidity: 72%
  • UV index: 8
  • Sunrise: 7:27 am EDT
  • Sunset: 6:48 pm EDT
  • ▼
The weather will be unstable for the next ten days, and a mix of cloud-filled, wet, storm-filled and dry and sunny weather is anticipated.
Rainfall is forecasted for Saturday, Sunday, Friday through next Sunday.
The temperature shift across days will be subtle in the forecast period ahead. Expected highs will hover between 82.4°F and 84.2°F, while the nighttime low will be also mostly stable, as the overnight low will fall between 75.2°F and 78.8°F.
Sunday through Tuesday, with the highest temperature of 84.2°F, will be the hottest days; all other days, the highest temperature will be 82.4°F.
Including the humidity's impact, the maximum feel-like temperature may increase substantially and vary between a tropical 86°F and a torrid 95°F.
Updated: Oct 18, 2026 @ 01:17:44 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, scattered thunderstorms are expected, accompanied by strong winds later in the day.

With a probability of 53%, moderate precipitation of 0.75" is predicted.

Tomorrow, the maximum temperature will be 84.2°F, while the minimum temperature will be 78.8°F. The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is evaluated at 95°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature tomorrow will be also in line with the average low temperature.

On Sunday, in Key Colony Beach, sunrise will be at 7:23 am and sunset at 6:54 pm (EDT).

In Key Colony Beach, the length of the day tomorrow will be 11h and 31min.