Sinsinawa Weather Forecast

    • 51
    • 61

    Chance Rain Showers

    • 46
    • 62

    Slight Chance Rain Showers

    • 48
    • 65

    Partly Sunny

    • 51
    • 65

    Mostly Cloudy

    • 52
    • 66

    Mostly Cloudy

    • 54
    • 68

    Mostly Cloudy

Today 21 Sep Grant

Mostly cloudy. A slight chance of Showers this Morning, then a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the lower 60s. Northeast Winds 10 to 15 Mph. Chance of rain 30 percent.

Tonight 21 Sep Grant

Mostly cloudy with a 50 percent chance of Showers. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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Sinsinawa Temperature Statistics

September Temperature

Dubuque Regional Airport (11.8 miles)

  • Lowest 14 September, 2026

    48.7 °F

  • Average September

    71 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Dubuque Regional Airport (11.8 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.4 °F
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