Weather forecast for 10 daysFlorida Keys Marathon Airport, FL
Weather forecast for the weekend
Sunday Oct 18, 2026
- 82°F
- 79°F
Scattered Thunderstorms / Wind
- Precip. probability: 53%
- Precipitation: 0.08"
- Wind: 22mphNE 53°
- Humidity: 80%
- UV index: 5
- Sunrise: 7:23 am EDT
- Sunset: 6:54 pm EDT
- details ▼
Today, scattered thunderstorms are expected, with gusty winds making it feel colder.
Minimal precipitation is anticipated. Temperature shifts will be modest, ranging from a peak of a moderately hot 82.4°F to a low of a warm 78.8°F.
The maximum heat index, which modifies the air temperature to account for humidity, is calculated to be a blazing 89.6°F. Note that heat index values are valued for light wind and location in the shade.
Sunrise was at 7:23 am and sunset will be at 6:54 pm; the daylight will last for 11h and 31min.
Minimal precipitation is anticipated. Temperature shifts will be modest, ranging from a peak of a moderately hot 82.4°F to a low of a warm 78.8°F.
The maximum heat index, which modifies the air temperature to account for humidity, is calculated to be a blazing 89.6°F. Note that heat index values are valued for light wind and location in the shade.
Sunrise was at 7:23 am and sunset will be at 6:54 pm; the daylight will last for 11h and 31min.
10-day overview
Daily temperatures
Warmest period: tomorrow - Tuesday 84°C.
Minimum temperature: 82°C.
Minimum temperature: 82°C.
Chance of precipitation
Highest chance: today 53%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 82°F
- 79°F
Scattered Thunderstorms / Wind
- Precip. probability: 53%
- Precipitation: 0.08"
- Wind: 22mphNE 53°
- Humidity: 80%
- UV index: 5
- Sunrise: 7:23 am EDT
- Sunset: 6:54 pm EDT
- details ▼
- Monday
- Oct 19, 2026
- 84°F
- 77°F
Partly Cloudy / Wind
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 22mphNE 55°
- Humidity: 70%
- UV index: 8
- Sunrise: 7:24 am EDT
- Sunset: 6:53 pm EDT
- details ▼
- Tuesday
- Oct 20, 2026
- 84°F
- 75°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 17mphNE 41°
- Humidity: 71%
- UV index: 9
- Sunrise: 7:24 am EDT
- Sunset: 6:53 pm EDT
- details ▼
- Wednesday
- Oct 21, 2026
- 82°F
- 75°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 14mphNNE 30°
- Humidity: 67%
- UV index: 8
- Sunrise: 7:25 am EDT
- Sunset: 6:52 pm EDT
- details ▼
- Thursday
- Oct 22, 2026
- 82°F
- 75°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 12mphNNE 32°
- Humidity: 67%
- UV index: 8
- Sunrise: 7:25 am EDT
- Sunset: 6:51 pm EDT
- details ▼
- Friday
- Oct 23, 2026
- 82°F
- 75°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0.12"
- Wind: 14mphNE 39°
- Humidity: 70%
- UV index: 8
- Sunrise: 7:26 am EDT
- Sunset: 6:50 pm EDT
- details ▼
- Saturday
- Oct 24, 2026
- 82°F
- 73°F
Showers
- Precip. probability: 45%
- Precipitation: 0.31"
- Wind: 18mphNE 34°
- Humidity: 72%
- UV index: 8
- Sunrise: 7:26 am EDT
- Sunset: 6:49 pm EDT
- details ▼
- Sunday
- Oct 25, 2026
- 82°F
- 75°F
Showers / Wind
- Precip. probability: 45%
- Precipitation: 0.35"
- Wind: 21mphNNE 32°
- Humidity: 74%
- UV index: 8
- Sunrise: 7:27 am EDT
- Sunset: 6:49 pm EDT
- details ▼
- Monday
- Oct 26, 2026
- 82°F
- 75°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 19mphNNE 30°
- Humidity: 70%
- UV index: 8
- Sunrise: 7:27 am EDT
- Sunset: 6:48 pm EDT
- details ▼
- Tuesday
- Oct 27, 2026
- 82°F
- 75°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 16mphNNE 27°
- Humidity: 70%
- UV index: 8
- Sunrise: 7:28 am EDT
- Sunset: 6:47 pm EDT
- details ▼
Looking ahead, conditions suggest a period of primarily overcast and occasionally wet and turbulent weather is anticipated.
Rainfall is expected on Sunday, Friday through next Sunday.
Temperature variation will be minimal in the coming days. Highs will range from 82.4°F to 84.2°F, while the lowest nightly temperature differences will be also negligible, as night temperatures will lie between 73.4°F and 78.8°F.
The hottest days in Florida Keys Marathon Airport will be Monday and Tuesday, with a maximum of 84.2°F; the rest of the days are expected to have a maximum temperature of 82.4°F.
Taking the humidity into consideration, the maximum feel-like temperature may increase and vary between a hot 86°F and a tropical 91.4°F.
Rainfall is expected on Sunday, Friday through next Sunday.
Temperature variation will be minimal in the coming days. Highs will range from 82.4°F to 84.2°F, while the lowest nightly temperature differences will be also negligible, as night temperatures will lie between 73.4°F and 78.8°F.
The hottest days in Florida Keys Marathon Airport will be Monday and Tuesday, with a maximum of 84.2°F; the rest of the days are expected to have a maximum temperature of 82.4°F.
Taking the humidity into consideration, the maximum feel-like temperature may increase and vary between a hot 86°F and a tropical 91.4°F.
Updated: Oct 18, 2026 @ 16:28:00 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, scattered thunderstorms are forecasted, and winds will pick up as the storm system moves through.
There is a high possibility of rainfall, but with minimal precipitation.
Today, the highest temperature will be 82.4°F, while the lowest temperature will be 78.8°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is calculated to be 89.6°F.
On Sunday, in Florida Keys Marathon Airport, sunrise was at 7:23 am and sunset will be at 6:54 pm (EDT).
In Florida Keys Marathon Airport, the length of the day today will be 11h and 31min.
