Long Slough Weather Forecast

    • 56
    • 81

    Mostly Cloudy

    • 57
    • 78

    Chance Rain Showers

    • 55
    • 81

    Slight Chance Rain Showers

    • 53
    • 82

    Mostly Sunny

    • 59
    • 84

    Partly Sunny

    • 63
    • 85

    Chance Thunderstorms

    • 62
    • 85

    Chance Thunderstorms

Today 30 May Grant

Mostly cloudy. Highs around 80. East Winds 10 to 15 Mph.

Tonight 30 May Grant

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 50s. East Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Long Slough Temperature Statistics

May Temperature

Dubuque Regional Airport (23 miles)

  • Lowest 2 May, 2026

    32 °F

  • Average May

    59.8 °F

  • Highest 27 May, 2026

    89.1 °F

Climate (2021–Present)

Dubuque Regional Airport (23 miles)

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  • Average Low 2021–2026

    40.6 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.5 °F
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