In late autumn the sky is crystal clear.

深秋的天空异常爽朗。

《新英汉大辞典》

The Fragrant Hills are exceptionally beautiful in late autumn.

深秋的香山格外美丽。

《新英汉大辞典》

These apples ripen in late autumn.

这些苹果晚秋才成熟。

youdao

Mulch can be added late in autumn to help moderate the effects of winter weather.

VOA: special.2009.06.30

Look: There was bound to be a little dial-back on the buzz that surrounded Brooklyn's basketball franchise in late autumn.

WSJ: Jason Gay: Psst, Brooklyn Is Back

Back in the hills you hear the pop-pop-pop all early morning long in the late autumn.

FORBES: The Other Tuscany

The thousands of islands of the Caribbean enjoy year-round sunshine, with the exception of a short hurricane season in late summer and autumn.

BBC: Cruise ports of call: Caribbean for beach lovers