A sky completely covered by clouds (8 oktas). Reduces solar radiation and creates diffused lighting.
basicWhat is Overcast?
Overcast conditions occur when a large-scale weather system covers the sky with a uniform layer of cloud. This is common during the monsoon season, before frontal passage, and in winter in northern climates. Overcast skies reduce maximum temperatures by 3–5°C compared to clear skies but keep minimum temperatures higher.
Key points
- A sky completely covered by clouds (8 oktas). Reduces solar radiation and creates diffused lighting.
- Category: basic
Related terms
See also: overcast is connected to other weather concepts. Browse the full glossary for related definitions.