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

Enjoy the warmth and sunshine, because forecasters say an unseasonable pattern of high temperatures in Southern California will end after Monday, bringing cooler weather and showers later this week. —Karen Garcia, Los Angeles Times, 9 Feb. 2026

First, there was an unseasonable cold snap in Florida that prompted NASA to delay a critical prelaunch test meant to assess the status of the Space Launch System (SLS) rocket that will propel the astronauts on journey around the moon. —Eric Lagatta, USA Today, 6 Feb. 2026

This happens, albeit rarely, when more sap than normal accumulates in a tree’s trunk during a period of unseasonable warmth. —Matthew Adams, Fort Worth Star-Telegram, 22 Jan. 2026

But unseasonable rains and low temperatures put a damper on attendance at last year’s festival. —George Varga, San Diego Union-Tribune, 21 Jan. 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