The story 'Miss Brill' doesn't explicitly mention a specific season. But based on the descriptions and atmosphere, it could potentially be autumn.
The season in which 'Miss Brill' takes place is left ambiguous. It could be summer, as the setting gives no definite cues about a particular season. Maybe the author intended to focus more on the characters' emotions rather than the time of year.
It's not clearly stated in the story which season it is. However, some readers might infer it to be spring based on the characters' behaviors and the general mood.