Grassdale Weather Forecast

    • 8
    • 20

    Cloudy

    • 9
    • 19

    Cloudy

    • 8
    • 18

    Cloudy

    • 8
    • 21

    Cloudy

    • 8
    • 28

    Partly cloudy

    • 11
    • 33

    Sunny

    • 14
    • 35

    Partly cloudy

Today 23 Dec South West

Cloudy. Medium chance of showers near the Otways, near zero chance elsewhere. Winds west to southwesterly 20 to 30 km/h decreasing to 15 to 20 km/h in the late evening. Daytime maximum temperatures between 19 and 22.

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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grassdale Temperature Statistics View More

December Temperature

Casterton (36km)

  • Lowest 7 December, 2025

    3.6 °C

  • Average December

    15.8 °C

  • Highest 18 December, 2025

    37.3 °C

Climate (2020–Present)

Casterton (36km)

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  • Average Low 2020–2025

    8.4 °C

  • Average 2020–2025

    13.5 °C

  • Average High 2020–2025

    19.7 °C
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