Finleyville Weather Forecast

    • 55
    • 84

    Sunny

    • 58
    • 85

    Mostly Sunny

    • 63
    • 84

    Partly Sunny

    • 62
    • 84

    Slight Chance Thunderstorms

    • 62
    • 83

    Chance Rain Showers

    • 61
    • 82

    Chance Rain Showers

    • 60
    • 80

    Chance Rain Showers

Today 18 Sep Washington

Sunny, warm. Near steady temperature in the lower 80s. Northwest Winds around 5 Mph.

Tonight 18 Sep Washington

Clear. Lows in the mid 50s. Northwest Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Finleyville Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (8.1 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    65.7 °F

  • Highest 15 September, 2025

    82.9 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (8.1 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    63.3 °F
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