St Marys Weather Forecast

    • 5
    • 13

    Becoming cloudy

    • 5
    • 20

    Sunny

    • 4
    • 21

    Sunny

    • 7
    • 19

    Mostly sunny

    • 6
    • 20

    Cloudy

    • 10
    • 21

    Possible shower

    • 9
    • 16

    Shower or two

Today 9 Sep East Coast

Partly cloudy. Slight chance of a shower in the south, most likely in the late morning and afternoon. Near zero chance of rain elsewhere. Patches of morning frost about higher ground. Winds west to southwesterly 25 to 35 km/h. Daytime maximum temperatures between 9 and 15.

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St Marys Temperature Statistics View More

September Temperature

St Helens Aerodrome (28km)

  • Lowest 8 September, 2026

    3.5 °C

  • Average September

    11.8 °C

  • Highest 1 September, 2026

    17.3 °C

Climate (2021–2026)

St Helens Aerodrome (28km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    13.4 °C

  • Average High 2021–2026

    18.3 °C
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