The winter sky is mottled with a northwest wind.
The summer morning fog breaks before ten o’clock.
The dawn is low.
The blue sky has a tendency to show green near the northern horizon (colder).
The sun breaks through a departing thunderstorm and makes a rainbow.
Snow-flurries drift down a north wind (colder).
Cirrus clouds, or others, dissolve, or cirrus have tails down.
There is a moderate dew or frost.
The temperature is normal or colder than normal, other signs being right.