pertaining to a condition when 3/8 to 5/8 of the sky is covered by opaque cloud cover
It is partly cloudy when the clouds are conspicuously present, but do not completely dull the sky or the day at any moment.
See partly sunny
The night was partly cloudy and cool—55 degrees—and a crescent moon climbed in the sky.
The 19th was partly cloudy; nearly calm to moderate wind, west and northwest; temperature, 30 to 40.
It was now partly cloudy, and hard to get a clear horizon, as the sun would dive in and out from behind the clouds.
The spring days will be either cloudy, partly cloudy, or clear.
These two types can be taken as the normal change of humidity with change of altitude in cloudy or partly cloudy weather.
The temperature at this time was 95° F., but the sky was partly cloudy.
October 15 was partly cloudy; wind very light to light, west to northwest and east; temperature, 21 to 36.
The night happened to be partly cloudy, with broken rifts showing the moon, and the wind blew unusually strong.
The next day was partly cloudy, with a mist squall or two; wind light to brisk, northwesterly; temperature, 38 to 51.5.
The night was partly cloudy, and faint moonlight struggled through the mist which shrouded us.