Fountainebleau's winters are mild, with average temperatures ranging from around 4-12°C in the coldest months, allowing for some outdoor activities. Spring brings a steady warming trend, with temperatures rising gradually towards the mid-30s by April and May. Summer is warm but not sweltering, with highs rarely exceeding 35°C, while autumns are generally mild and pleasant, with temperatures dipping only slightly after September. The temperature range expands significantly during the summer months, but remains relatively consistent throughout the year, allowing for a wide range of outdoor activities.