Sky Condition
Weather
Used in a forecast to describes the predominant/average sky condition based upon octants (eighths) of the sky covered by opaque (not transparent) clouds.
| Sky Condition | Cloud Coverage |
| Clear / Sunny | 0/8 |
| Mostly Clear / Mostly Sunny | 1/8 to 2/8 |
| Partly Cloudy / Partly Sunny | 3/8 to 4/8 |
| Mostly Cloudy / Considerable Cloudiness | 5/8 to 7/8 |
| Cloudy | 8/8 |
| Fair (mainly for night) | Less than 4/10 opaque clouds, no precipitation, no extremes of visibility/temperature/wind |