Romainville's winters are cool and occasionally frosty, with temperatures often below freezing but rarely dropping extremely low. Spring brings mild temperatures, gradually warming up as the season progresses, with April and May being particularly pleasant. Summer is warm but not hot, with July being the warmest month, while August can be slightly cooler due to increased cloud cover. Autumn sees a return to milder temperatures, similar to those of spring, before the coolness of winter sets in again. Overall, Romainville's climate is characterized by moderate temperatures and limited extremes throughout the year.