Summers Weather Forecast

    • 64
    • 89

    Rain Showers Likely

    • 64
    • 84

    Chance Thunderstorms

    • 66
    • 86

    Chance Thunderstorms

    • 66
    • 85

    Rain Showers Likely

    • 64
    • 83

    Chance Thunderstorms

    • 60
    • 78

    Chance Rain Showers

    • 58
    • 76

    Chance Rain Showers

Today 18 Sep Washington

Mostly sunny. A chance of Showers and Thunderstorms. Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 50 percent.

Tonight 18 Sep Washington

A chance of Thunderstorms. A chance of Showers this Evening, then Showers likely after midnight. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summers Temperature Statistics

September Temperature

Siloam Springs, Smith Field Airport (14.9 miles)

  • Lowest 7 September, 2025

    53.1 °F

  • Average September

    71.4 °F

  • Highest 13 September, 2025

    90 °F

Climate (2020–Present)

Siloam Springs, Smith Field Airport (14.9 miles)

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  • Average Low 2020–2025

    49.4 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    69.6 °F
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