Winters in Le Grand-Quevilly are generally mild, with temperatures rarely dropping below freezing and occasionally rising above 13°C in January. As the season progresses, temperatures gradually warm up, but February is still quite chilly, with cold snaps and occasional warmer days reaching up to 19°C. Spring arrives in March and April, bringing rising temperatures that can reach up to 24°C on occasion, with a moderate average temperature around 8-11°C. Summer months of June and July are the warmest, with highs often exceeding 30°C, while August tends to be slightly cooler due to increased cloud cover. Autumn brings a return to milder temperatures in October, followed by a slight chill in November before winter sets back in.