autumnal

adjective

au·​tum·​nal ȯ-ˈtəm-nəl 

: of, relating to, or characteristic of autumn

autumnal weather

autumnal colors

the autumnal equinox

I am often surprised to see rising amid these trees the rounded tops of apple-trees glowing with red or yellow fruit, in harmony with the autumnal tints of the forest.

—Henry David Thoreau

autumnally

ȯ-ˈtəm-nə-lē 

adverb

These days on the verge of winter were autumnally fair, struck through with warmth until the swift lengthening of the shadows.

—John Updike

Examples of autumnal in a Sentence

Recent Examples on the Web

Meteorological fall begins on Sept. 1 while astronomical fall begins on Sept. 22, with the autumnal equinox. —Cailey Gleeson, jsonline.com, 17 July 2025

The air seemed to cool on some tracks and the mood turn reflective, autumnal. —CBS News, 11 June 2025

This buttery-looking Free People sweater has a mock neck and a particularly autumnal hue, and these 45-percent-off Levi’s jeans balance out its stylishly slouchy look. —Alyssa Grabinski, People.com, 8 July 2025

Persimmons are a sweet, autumnal fruit that falls from the Diospyros tree. —Anna Cecil, IndyStar, 2 July 2025

Word History

Etymology

borrowed from Latin autumnālis, from autumnus autumn + -ālis -al entry 1

First Known Use

15th century, in the meaning defined above