clement

Clement weather is lovely and mild. You might describe a beautiful, warm summer evening as clement.

Clement can describe a pleasant climate — "The thing about Hawaii is it's such a clement place, always." — or even a merciful, gentle person. It's much more common to hear the antonym of clement, inclement, describing terrible weather. Clement first appeared in the 13th century as a surname, or last name, from the Latin clementem, "mild or placid," and was used to describe nice weather by the 17th century.

Definitions of clement
1

adj (of weather or climate) physically mild

clement weather”
Synonyms:
balmy, mild, soft
mild and pleasant
temperate
(of weather or climate) free from extremes; mild; or characteristic of such weather or climate
Antonyms:
inclement
(of weather or climate) severe
intemperate
(of weather or climate) not mild; subject to extremes
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adj (used of persons or behavior) inclined to show mercy

“a more clement judge reduced the sentence”
Synonyms:
lenient
characterized by tolerance and mercy
merciful
showing or giving mercy
Antonyms:
inclement
used of persons or behavior; showing no clemency or mercy
unsparing
not forbearing; ruthless
merciless, unmerciful
having or showing no mercy
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