An Etymological Dictionary of Astronomy and Astrophysics

The characteristic meteorological conditions (temperature, precipitation, and wind) and their extremes, of any place or region. In other words, weather patterns averaged over a given period of time to obtain a consistent pattern of the expected atmospheric conditions.

Etymology (EN): M.E. climat, from M.Fr. climat, from L. clima, climat- “region, slope of the Earth,” from Gk. klima “region, zone,” from base of klinein “to slope,” thus “slope of the Earth from equator to pole,” from PIE base *klei- “to lean,” → inclination.

Etymology (PE): Kelimâ, loan from Fr., as above.
Âbohavâ, from âb, → water, + -o- “and” + havâ “weather” → air.