Definition of "seasonable"

Nor is it seasonable to have to do with Hercules, whil'st he is enraged, and amongst the Furies, but when he is telling merry tales amongst the Meonion Damosels.

1661, Thomas, transl. Salusbury, “Galilaeus Galilaeus Lyncaeus, His Systeme of the World”, in Mathematical Collections and Translations, The Second Dialogue, London: William Leybourn, translation of Dialogo sopra i due massimi sistemi del mondo by Galileo Galilei, page 95

It was a wild, cold, seasonable night of March, with a pale moon, lying on her back as though the wind had tilted her, and flying wrack of the most diaphanous and lawny texture.

1886, Robert Louis Stevenson, Strange Case Of Dr Jekyll And Mr Hyde