Definitions

1. noun

A unit of measurement for cloud cover, equal to one-tenth of the sky covered by cloud.

“The meteorologist reported that the sky was 5 oktas cloudy.”

2. noun

A unit of measurement for the intensity of sunlight, equal to one-tenth of the total amount of sunlight.

“The okta reading showed a significant decrease in sunlight due to the thick clouds.”

3. noun

A unit of measurement for the density of fog, equal to one-tenth of the total amount of fog.

“The okta reading indicated a heavy fog warning for the area.”