The highest day temperature in October 2025 was 73°F. The lowest night temperature was 38°F. The average values for day and night temperatures during October were 57.0°F и 46.7°F respectivly.

The average sea surface temperature in October 2025 for Whidbey Island was 54.6°F. The maximum and minimum values were 52.2°F and 57.4°F respectively.

You can expect various weather conditions during October. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in October for Whidbey Island is 1.3 in.

The average wind speed in October is 5.7 mph. This value is relatively stable throughout the year.

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 Whidbey Island in October is 5.8 hours.