St Marys Weather Forecast
- 7
- 24
Mostly sunny
- 11
- 30
Mostly sunny
- 12
- 26
Possible shower
- 11
- 17
Shower or two
- 11
- 22
Showers
- 11
- 20
Showers increasing
- 10
- 21
Possible shower
Today 16 Dec East Coast
Mostly sunny. Winds northwest to southwesterly 20 to 30 km/h tending northeast to southeasterly 15 to 20 km/h in the late afternoon then becoming light in the evening. Daytime maximum temperatures in the low to mid 20s.
St Marys Temperature Statistics View More
December Temperature
St Helens Aerodrome (28km)
Lowest 2 December, 2025
6.6 °CAverage December
15.4 °CHighest 4 December, 2025
27.3 °C
Climate (2020–Present)
St Helens Aerodrome (28km)
Average Low 2020–2025
9.3 °CAverage 2020–2025
13.3 °CAverage High 2020–2025
18.2 °C