Weather forecast for tomorrowGrand Isle, ME
Weather forecast for tomorrow
Monday Oct 19, 2026
- 63°F
- 34°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 10mphSSW 193°
- Humidity: 62%
- UV index: 3
- Sunrise: 6:57 am EDT
- Sunset: 5:37 pm EDT
- details ▼
On Monday, in Grand Isle, the forecast calls for abundant sunshine.
Substantial temperature variations are anticipated, soaring to a maximum of a comfortable 62.6°F and descending to a minimum of an icy 33.8°F.
A forecast high of 62.6°F brings conditions more familiar to September's average than October's.
Sunrise will be at 6:57 am and sunset at 5:37 pm; tomorrow's daylight will last for 10h and 41min.
Substantial temperature variations are anticipated, soaring to a maximum of a comfortable 62.6°F and descending to a minimum of an icy 33.8°F.
A forecast high of 62.6°F brings conditions more familiar to September's average than October's.
Sunrise will be at 6:57 am and sunset at 5:37 pm; tomorrow's daylight will last for 10h and 41min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 61°C.
Coldest hour: 6 am 34°C.
Coldest hour: 6 am 34°C.
Chance of precipitation
Highest chance: 12 am - 6 am 6%.
Hourly weather forecast
- 12 am
- 36°F
- Feels like:30°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSSE 162°
- Humidity: 87%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 34°F
- Feels like:30°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphSSE 166°
- Humidity: 88%
- Pressure: 30.42"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 36°F
- Feels like:30°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphS 170°
- Humidity: 86%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 34°F
- Feels like:30°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphSSE 168°
- Humidity: 84%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 6:57 am
- 8 am
- 34°F
- Feels like:30°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphS 172°
- Humidity: 86%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 41°F
- Feels like:37°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 6mphS 179°
- Humidity: 77%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 12 pm
- 50°F
- Feels like:48°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphS 190°
- Humidity: 60%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 2 pm
- 59°F
- Feels like:55°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphSSW 204°
- Humidity: 47%
- Pressure: 30.24"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 61°F
- Feels like:61°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSSW 209°
- Humidity: 43%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
Sunset: 5:37 pm
- 6 pm
- 57°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphSSW 208°
- Humidity: 49%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 8 pm
- 48°F
- Feels like:48°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 3mphSSW 211°
- Humidity: 70%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 45°F
- Feels like:45°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 2mphWSW 241°
- Humidity: 81%
- Pressure: 30.24"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, a combination of clear and cloudy weather is predicted.
The temperature will vary between the lowest temperature of 33.8°F and the highest temperature of 60.8°F. The warmest part of the day will be from 3 pm to 5 pm.
The forecasted maximum is more comparable to September's typical high of 63.5°F than the average for October. The expected low will be resembling the average minimum in October, which is 36°F.
The temperature will vary between the lowest temperature of 33.8°F and the highest temperature of 60.8°F. The warmest part of the day will be from 3 pm to 5 pm.
The forecasted maximum is more comparable to September's typical high of 63.5°F than the average for October. The expected low will be resembling the average minimum in October, which is 36°F.
Updated: Oct 18, 2026 @ 14:05:28 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
Tomorrow, in Grand Isle, expect bright skies and plenty of sunshine.
Tomorrow, the highest temperature in Grand Isle will be 62.6°F, while the lowest temperature will be 33.8°F.
The maximum temperature will be uncommonly higher than the average highest temperature of 49.5°F in October. The lowest temperature will be in line with the average low of 36°F.
The maximum temperature will be uncommonly higher than the average highest temperature of 49.5°F in October. The lowest temperature will be in line with the average low of 36°F.
On Monday, in Grand Isle, sunrise will be at 6:57 am and sunset at 5:37 pm (EDT).
In Grand Isle, tomorrow, there will be 10h and 41min of daylight.
