Crosne is located in Île-de-France and enjoys a degraded oceanic climate with cool winters and mild summers, and has regular rainfall throughout the year. The annual average temperature is 10.8 °C, with a maximum of 15.2 °C and a minimum of 6.4 °C. The temperatures per month recorded are 24.5 °C in July at the maximum and 0.7 °C in January at the minimum, but the registered records are 38.2 °C on 1 July 1952 and −19.6 °C on 17 January 1985. Due to the lower urban density between Paris and its suburbs, a negative difference of one to two degrees Celsius is felt strongly. The amount of sunshine is comparable to the average for the northern regions of the Loire with 1,798 hours per year. Precipitation is evenly distributed over the year, with a total of 598.3 millimeters of rain and an approximate average of fifty millimeters per month.
