Rock Island Arsenal Weather Forecast

    • 65
    • 79

    Slight Chance Thunderstorms

    • 68
    • 78

    Rain Showers Likely

    • 65
    • 85

    Rain Showers Likely

    • 59
    • 71

    Rain Showers Likely

    • 56
    • 67

    Chance Rain Showers

    • 55
    • 68

    Partly Sunny

Today 17 Sep Rock Island

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms early this morning. Patchy fog early this morning. Some Thunderstorms may produce heavy rainfall early this morning. Highs in the upper 70s. Southeast Winds around 5 Mph, becoming north this afternoon. Chance of rain 40 percent.

Tonight 17 Sep Rock Island

Mostly cloudy. Humid with Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Island Arsenal Temperature Statistics

September Temperature

Moline Quad-City Airport (4.3 miles)

  • Lowest 14 September, 2026

    52 °F

  • Average September

    75.4 °F

  • Highest 4 September, 2026

    96.7 °F

Climate (2021–2026)

Moline Quad-City Airport (4.3 miles)

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  • Average Low 2021–2026

    42.9 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    64.1 °F
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