Aztalan State Park Weather Forecast

    • 40
    • 42

    Rain Likely

    • 17
    • 50

    Rain

    • 8
    • 22

    Snow Likely

    • 16
    • 25

    Mostly Cloudy

    • 6
    • 25

    Chance Snow

    • -1
    • 12

    Mostly Sunny

Today 27 Dec Jefferson

Cloudy. Near steady temperature around 40. Southeast Winds around 10 Mph.

Tonight 27 Dec Jefferson

Cloudy. Areas of fog through the night. Chance of drizzle in the late evening and overnight. Near steady temperature around 40. Southeast Winds up to 10 Mph. Chance of precipitation 50 percent.

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Aztalan State Park Temperature Statistics

December Temperature

Watertown (9.9 miles)

  • Lowest 14 December, 2025

    -7.2 °F

  • Average December

    20.8 °F

  • Highest 23 December, 2025

    43.3 °F

Climate (2020–Present)

Watertown (9.9 miles)

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  • Average Low 2020–2025

    35.7 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    54.5 °F
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