The highest day temperature in April 2025 was 71°F. The lowest night temperature was 38°F. The average values for day and night temperatures during April were 57.9°F и 47.0°F respectivly.

The average sea surface temperature in April 2025 for Whidbey Island was 50.1°F. The maximum and minimum values were 46.6°F and 52.8°F respectively.

Most of the days in April are gloomy but you can also expect sunny days.

Precipitation total in April for Whidbey Island is 1.2 in.

The average wind speed in April is 6.4 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 April is 5.7 hours.