Blackhawk Island Airport Weather Forecast

    • 57
    • 78

    Mostly Cloudy

    • 61
    • 79

    Partly Sunny

    • 67
    • 85

    Partly Sunny

    • 72
    • 92

    Chance Rain Showers

    • 67
    • 93

    Slight Chance Thunderstorms

    • 63
    • 87

    Partly Sunny

Today 23 Jul Jefferson

Sunny late in the morning then becoming partly sunny. Highs in the upper 70s. Southwest Winds around 5 Mph.

Tonight 23 Jul Jefferson

Partly cloudy then becoming mostly cloudy after midnight then becoming partly cloudy. Lows in the mid 50s. South Winds up to 5 Mph through around midnight becoming calm.

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Blackhawk Island Airport Temperature Statistics

July Temperature

Watertown (18.6 miles)

  • Lowest 7 July, 2026

    53.2 °F

  • Average July

    75.8 °F

  • Highest 14 July, 2026

    95.4 °F

Climate (2021–2026)

Watertown (18.6 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    54 °F
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