Aztalan State Park Weather Forecast

    • 3
    • 21

    Decreasing Clouds

    • 15
    • 25

    Snow Likely

    • 12
    • 25

    Slight Chance Snow

    • 10
    • 25

    Slight Chance Snow

    • 9
    • 23

    Mostly Cloudy

    • 20
    • 29

    Chance Snow

Today 31 Jan Jefferson

Partly sunny in the morning then clearing. Highs in the lower 20s. North Winds 5 to 10 Mph.

Tonight 31 Jan Jefferson

Mostly cloudy. A 20 percent chance of snow Showers after midnight. Lows around 5. Northwest Winds 10 to 15 Mph.

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Aztalan State Park Temperature Statistics

January Temperature

Watertown (9.9 miles)

  • Lowest 23 January, 2026

    -17.5 °F

  • Average January

    17.5 °F

  • Highest 9 January, 2026

    55.2 °F

Climate (2021–Present)

Watertown (9.9 miles)

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  • Average Low 2021–2026

    35.6 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    54.4 °F
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