St Marys Weather Forecast
- 3
- 19
Partly cloudy
- 11
- 23
Partly cloudy
- 12
- 21
Shower or two
- 9
- 14
Shower or two
- 8
- 14
Shower or two
- 8
- 15
Shower or two
- 8
- 18
Possible shower
Today 29 Sep East Coast
Partly cloudy. Slight chance of a shower. Winds north to northwesterly 20 to 30 km/h increasing to 25 to 35 km/h in the late evening.
St Marys Temperature Statistics View More
September Temperature
St Helens Aerodrome (28km)
Lowest 22 September, 2026
1.7 °CAverage September
12.1 °CHighest 20 September, 2026
23.6 °C
Climate (2021–2026)
St Helens Aerodrome (28km)
Average Low 2021–2026
9.4 °CAverage 2021–2026
13.4 °CAverage High 2021–2026
18.4 °C