Weather forecast for tomorrowSummerland Key, FL
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 84°F
- 77°F
PM Thunderstorms
- Precip. probability: 48%
- Precipitation: 0.24"
- Wind: 19mphNE 45°
- Humidity: 79%
- UV index: 7
- Sunrise: 7:25 am EDT
- Sunset: 6:56 pm EDT
- details ▼
On Sunday, October 18, afternoon thunderstorms are expected, possibly with frequent lightning.
The likelihood of rainfall for tomorrow is low, and light precipitation is anticipated. A modest temperature shift from a temperate 84.2°F at its peak to a warm 77°F at its lowest point is forecasted.
The maximum heat index, which combines relative humidity and air temperature, is evaluated at 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.
The predicted temperature peak will correspond with October's average maximum of 82°F.
Sunrise will be at 7:25 am and sunset at 6:56 pm; tomorrow's daylight will last for 11h and 31min.
The likelihood of rainfall for tomorrow is low, and light precipitation is anticipated. A modest temperature shift from a temperate 84.2°F at its peak to a warm 77°F at its lowest point is forecasted.
The maximum heat index, which combines relative humidity and air temperature, is evaluated at 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.
The predicted temperature peak will correspond with October's average maximum of 82°F.
Sunrise will be at 7:25 am and sunset at 6:56 pm; tomorrow's daylight will last for 11h and 31min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 91°C.
Coldest hour: 3 am 79°C.
Coldest hour: 3 am 79°C.
Chance of precipitation
Highest chance: 12 am 95%.
Hourly weather forecast
- 12 am
- 79°F
- Feels like:86°F
Thunderstorms
- Precip. probability: 95%
- Precipitation: 0.08"
- Wind: 11mphNNE 31°
- Humidity: 90%
- Pressure: 29.97"Hg
- Visibility: 6mi
- UV index: 0
- details ▼
- 2 am
- 79°F
- Feels like:84°F
Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 16mphNE 36°
- Humidity: 89%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 4 am
- 77°F
- Feels like:84°F
Mostly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 16mphNNE 32°
- Humidity: 88%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 6 am
- 77°F
- Feels like:82°F
Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 16mphNNE 32°
- Humidity: 89%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Sunrise: 7:25 am
- 8 am
- 77°F
- Feels like:82°F
Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 17mphNNE 33°
- Humidity: 89%
- Pressure: 29.97"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 10 am
- 81°F
- Feels like:86°F
Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 19mphNE 41°
- Humidity: 80%
- Pressure: 30"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 12 pm
- 82°F
- Feels like:90°F
Mostly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 19mphNE 47°
- Humidity: 76%
- Pressure: 30"Hg
- Visibility: 10mi
- UV index: 5
- details ▼
- 2 pm
- 84°F
- Feels like:91°F
Isolated Thunderstorms
- Precip. probability: 31%
- Precipitation: 0.04"
- Wind: 18mphNE 56°
- Humidity: 74%
- Pressure: 29.97"Hg
- Visibility: 9mi
- UV index: 7
- details ▼
- 4 pm
- 82°F
- Feels like:91°F
Scattered Thunderstorms
- Precip. probability: 38%
- Precipitation: 0.04"
- Wind: 19mphNE 53°
- Humidity: 74%
- Pressure: 29.94"Hg
- Visibility: 7mi
- UV index: 2
- details ▼
- 6 pm
- 82°F
- Feels like:88°F
Scattered Thunderstorms
- Precip. probability: 48%
- Precipitation: 0.08"
- Wind: 18mphNE 50°
- Humidity: 76%
- Pressure: 29.94"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
Sunset: 6:56 pm
- 8 pm
- 81°F
- Feels like:86°F
Mostly Cloudy / Wind
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 19mphNE 51°
- Humidity: 79%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 79°F
- Feels like:84°F
Few Showers / Wind
- Precip. probability: 32%
- Precipitation: 0.04"
- Wind: 21mphNE 48°
- Humidity: 80%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Sunday, a combination of overcast, unstable and damp weather is expected.
Rainfall is expected at 12 am, 1 am, and from 2 pm to 7 pm and at 10 pm. The most intense rain will be falling at 12 am, 5 pm and 6 pm.
The temperature will be between a minimum of 77°F and a maximum of 84.2°F. The feels-like temperature will vary between the lowest temperature of 78.8°F and the highest temperature of 91.4°F. The hottest part of the day will be at 2 pm and 3 pm.
The maximum temperature will be comparable to October's average highest temperature of 82°F. Tomorrow, the lowest temperature will be also similar to October's usual minimum.
Rainfall is expected at 12 am, 1 am, and from 2 pm to 7 pm and at 10 pm. The most intense rain will be falling at 12 am, 5 pm and 6 pm.
The temperature will be between a minimum of 77°F and a maximum of 84.2°F. The feels-like temperature will vary between the lowest temperature of 78.8°F and the highest temperature of 91.4°F. The hottest part of the day will be at 2 pm and 3 pm.
The maximum temperature will be comparable to October's average highest temperature of 82°F. Tomorrow, the lowest temperature will be also similar to October's usual minimum.
Updated: Oct 18, 2026 @ 00:20:06 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, in Summerland Key, thunder and rain showers will move in during the afternoon.
Light precipitation of 0.24" is forecasted. The possibility of rainfall is 48%.
Tomorrow, the maximum temperature will be 84.2°F, while the minimum temperature will be 77°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is computed to be 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.
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 Summerland Key, sunrise will be at 7:25 am and sunset at 6:56 pm (EDT).
Tomorrow, the daylight will last for 11h and 31min.





