Grantsburg Municipal Airport Weather Forecast

    • 14
    • 23

    Chance Wintry Mix

    • 19
    • 35

    Mostly Cloudy

    • 12
    • 28

    Mostly Cloudy

    • 24
    • 34

    Mostly Cloudy

    • 19
    • 39

    Mostly Cloudy

    • 16
    • 30

    Mostly Cloudy

Today 21 Dec Burnett

Mostly sunny. Highs in the lower 20s. South Winds 5 to 10 Mph.

Tonight 21 Dec Burnett

Partly cloudy in the Evening, then mostly cloudy with a chance of snow after midnight. Little or no snow accumulation. Not as cool with Lows around 13. Temperature rising into the mid 20s after midnight. South Winds around 5 Mph. Chance of snow 40 percent.

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Grantsburg Municipal Airport Temperature Statistics

December Temperature

Siren, Burnett County Airport (13.7 miles)

  • Lowest 4 December, 2025

    -17 °F

  • Average December

    12.8 °F

  • Highest 16 December, 2025

    42.8 °F

Climate (2020–Present)

Siren, Burnett County Airport (13.7 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    43.9 °F

  • Average High 2020–2025

    53.8 °F
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