St Marys Weather Forecast
- 15
- 30
Shower or two developing
- 16
- 19
Shower or two
- 16
- 21
Showers increasing
- 17
- 28
Showers. Storm developing
- 17
- 27
Shower or two
- 17
- 32
Possible shower
- 21
- 33
Shower or two
Today 20 Nov Sydney
Partly cloudy. The chance of smoke haze in the early morning. Medium chance of showers in the afternoon and evening. The chance of a thunderstorm in the afternoon and early evening. Winds south to southeasterly 15 to 20 km/h tending east to southeasterly 20 to 30 km/h in the morning then tending south to southeasterly 25 to 35 km/h in the early afternoon.
St Marys Temperature Statistics View More
November Temperature
Penrith Lakes (10km)
Lowest 12 November, 2025
7.5 °CAverage November
20.5 °CHighest 8 November, 2025
35.4 °C
Climate (2020–Present)
Penrith Lakes (10km)
Average Low 2020–2025
12.5 °CAverage 2020–2025
17.7 °CAverage High 2020–2025
24.7 °C