Cornwall Weather Forecast

    • 13
    • 25

    Possible storm

    • 12
    • 19

    Becoming windy. Partly cloudy

    • 6
    • 18

    Partly cloudy

    • 6
    • 21

    Mostly sunny

    • 9
    • 27

    Mostly sunny

    • 10
    • 28

    Possible shower developing

    • 12
    • 18

    Shower or two

Today 13 Dec East Coast

Partly cloudy. The chance of a thunderstorm early this evening, possibly severe with damaging winds about higher ground. Winds northeast to southeasterly 15 to 20 km/h tending north to northwesterly 15 to 25 km/h in the late evening.

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Cornwall Temperature Statistics View More

December Temperature

St Helens Aerodrome (27km)

  • Lowest 2 December, 2025

    6.6 °C

  • Average December

    15.3 °C

  • Highest 4 December, 2025

    27.3 °C

Climate (2020–Present)

St Helens Aerodrome (27km)

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  • Average Low 2020–2025

    9.3 °C

  • Average 2020–2025

    13.3 °C

  • Average High 2020–2025

    18.2 °C
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