Saint-Witz (French pronunciation: [sɛ̃ vits]) is a commune in the Val-d'Oise department in Île-de-France in northern France.

The average annual rainfall is 676.8 mm (26.65 in) with December as the wettest month.

The temperatures are highest on average in July, at around 20.0 °C (68.0 °F), and lowest in January, at around 4.0 °C (39.2 °F).

Public secondary schools: Collège Institut Paul Ricoeur/Lycée Institut Paul RICOEUR is in nearby Louvres.

[7][8] Institut Saint-Dominique, a private Catholic preschool through senior high, is in nearby Mortefontaine, Oise.