Boissy-l'Aillerie

Boissy-l'Aillerie is a commune in the Val-d'Oise department in Île-de-France in northern France.

Pontoise – Cormeilles Aerodrome is located in the commune. At one time Aigle Azur's head office was on the grounds of the airport.

Climate
Boissy-l'Aillerie has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Boissy-l'Aillerie is 11.2 C. The average annual rainfall is 635.8 mm with December as the wettest month. The temperatures are highest on average in July, at around 18.9 C, and lowest in January, at around 4.3 C. The highest temperature ever recorded in Boissy-l'Aillerie was 41.6 C on 25 July 2019; the coldest temperature ever recorded was -17.8 C on 17 January 1985.

Education
, the communal preschool (maternelle) had 65 students and the communal elementary school had 128 students.