The highest day temperature in October 2025 was 82°F. The lowest night temperature was 33°F. The average values for day and night temperatures during October were 59.0°F и 45.4°F respectivly.

The average sea surface temperature in October 2025 for Mount Desert Island was 55.5°F. The maximum and minimum values were 53.2°F and 59.2°F respectively.

Most of the days in October are sunny but you can also expect cloudy and gloomy days.

Precipitation total in October for Mount Desert Island is 1.4 in. It makes october one of the most rainy months of the year.

The average wind speed in October is 8.0 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Mount Desert Island in October is 6.3 hours.