Finleyville Weather Forecast

    • 21
    • 32

    Increasing Clouds

    • 13
    • 34

    Snow

    • 14
    • 19

    Chance Snow Showers

    • 13
    • 22

    Mostly Cloudy

    • 26
    • 32

    Mostly Cloudy

    • 35
    • 43

    Chance Rain

    • 31
    • 51

    Rain Likely

Today 12 Dec Washington

Mostly sunny. Near steady temperature in the lower 30s. Southwest Winds around 5 Mph.

Tonight 12 Dec Washington

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 20s. Temperatures rising into the mid 20s after midnight. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Finleyville Temperature Statistics

December Temperature

Pittsburgh - Allegheny County Airport (8.1 miles)

  • Lowest 9 December, 2025

    12.9 °F

  • Average December

    28.1 °F

  • Highest 10 December, 2025

    43 °F

Climate (2020–Present)

Pittsburgh - Allegheny County Airport (8.1 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    63.3 °F
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