Canonsburg Weather Forecast

    • 58
    • 77

    Decreasing Clouds

    • 65
    • 80

    Rain Showers

    • 60
    • 78

    Rain Showers

    • 58
    • 70

    Rain Showers Likely

    • 55
    • 67

    Rain Showers Likely

    • 54
    • 66

    Chance Rain Showers

Today 18 Sep Washington

Partly sunny. Near steady temperature in the mid 70s. North Winds 5 to 10 Mph.

Tonight 18 Sep Washington

Mainly clear. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Canonsburg Temperature Statistics

September Temperature

Washington - Washington County Airport (9.9 miles)

  • Lowest 8 September, 2026

    55.9 °F

  • Average September

    74.3 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Washington - Washington County Airport (9.9 miles)

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  • Average Low 2021–2026

    42.4 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    62.5 °F
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