St Marys, New South Wales, is located on the eastern side of the Penrith Local Government Area. Its western boundary is South Creek with the M4 Motorway as its southern boundary. Mardsen Road and Sydney Street divides this suburb from the smaller suburbs of Colyton and Oxley Park on its western boundary. Its northern section takes in the previously named industrial suburb of Dunheved.
St Marys has a long and rich industrial and agricultural history including tanneries and munitions. The area which is now the suburb is much reduced from its historical perspective known as St Marys. This suburb is the major industrial, commercial and residential centre for the eastern side of the local government area. This suburb services many rural and urban communities, making it a vital part of the City of Penrith.
Temperatures for St Marys
St Marys has moderate summer temperatures. The summer high temperature for St Marys is approximately 28 °c. The summer low temperature is approximately 16 °c.
St Marys has mild winter temperatures. The winter high temperature for St Marys is approximately 17 °c. The winter low temperature is approximately 6 °c.