The Île-de-France climate is described as a modified oceanic climate, owing to the more pronounced annual differences in temperature and lower rainfall figures obtained, compared with the oceanic border. The climate is much the same across the region, apart from the influence of the Paris heat island on minimum temperatures, which are therefore somewhat milder (an annual average of +2°C as compared with forested areas).
Île-de-France has a mild, temperate, maritime climate.
Rainfall is distributed equally throughout the year. Though regular and uniform as a rule, on average there is more rain between Brie and Plaine de France and on the Vexin plateau than in most of the rest of the region.
In the winter months, the average temperature falls to 5°C. It is not unusual to see snow and ice in January and February. The average summer temperature is 19.5°C. Some days are much hotter and drier than the average, while on other days the darker, rainy weather means you will probably need to take a jacket if you go out.