How to Measure Cloud Cover Cloud cover is measured and recorded using a scale called the Okta Scale.
Cloud cover is estimated in terms of how many eighths of the sky are covered in cloud:
from 0 Oktas (completely clear sky) … Cloud Cover
Symbol Scale in oktas (eighths) 0
Sky completely clear to 8 Oktas (completely overcast).
1 2 3 4 5 6 7 8
(9)
Sky half cloudy
Sky completely cloudy Sky obstructed from view
Cloud Cover on a Weather Map
SUNDAY CLOUDS & RAIN
Examine these two weather maps showing cloud cover. 1. Which map shows more cloud cover? 2. Which map shows the greater likelihood of precipitation? Explain your answer.
