Issy-les-Moulineaux, France experiences a mild climate with distinct seasonal changes. Winters are cool and unpredictable, with temperatures often dropping below freezing in January and February, but also experiencing warmer days. Spring arrives in March and April, bringing rising temperatures and occasional warm spells, with May being the first month to consistently see above-average highs. Summer months of June, July, and August are warm and stable, with average high temperatures ranging from 18-19°C, while September marks a gentle decline into autumn. As winter returns, October is generally cooler than the summer months, but still milder than the depths of January and February.