unseasonable

adjective

un·​sea·​son·​able

ˌən-ˈsēz-nə-bəl, 

-ˈsē-zᵊn-ə- 

1

: occurring at other than the proper time : untimely

… she made several excursions over to Canterbury to see me, and always at unseasonable hours …

—Charles Dickens

2

: not being in season

3

a

: not normal for the season of the year

unseasonable weather

b

: marked by unseasonable weather

an unseasonable summer

unseasonableness noun

unseasonably

ˌən-ˈsēz-nə-blē, 

-ˈsē-zᵊn-ə- 

adverb

Synonyms of unseasonable

• early
• unexpected
• sudden
• untimely
• premature
• precocious
• inopportune

Examples of unseasonable in a Sentence

an unseasonable snowstorm in early November

Recent Examples on the Web

An unseasonable weather pattern that included heavy rain and sweltering heat served as a signal for rattlesnakes to slither out of their underground winter burrows in search of food and mates. —Karen Garcia, Los Angeles Times, 22 Apr. 2026

After several days of unseasonable warmth, freezing temperatures are expected overnight across parts of the Delaware Valley — a sudden swing that could impact both backyard plants and commercial crops. —Eva Andersen, CBS News, 21 Apr. 2026

Record-breaking heat is expected to take hold across states from the Plains to the Northeast this week, causing temperatures to soar to unseasonable highs. —Denise Chow, NBC news, 14 Apr. 2026

March’s persistent unseasonable heat was so intense that the continental United States registered its most abnormally hot month in 132 years of records, according to federal weather data. —Seth Borenstein, Fortune, 9 Apr. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for unseasonable

• reasonable
• seasonable
• treasonable

Kids Definition

unseasonable

adjective

un·​sea·​son·​able ˌən-ˈsēz-nə-bəl 

-ˈsēz-ᵊn-ə-

1

: happening or coming at the wrong time : untimely

an unseasonable visit

2

: not normal for the season of the year

unseasonable weather

unseasonably

-blē 

adverb