Hillman State Park Weather Forecast

    • 67
    • 79

    Rain Showers

    • 59
    • 79

    Chance Thunderstorms

    • 57
    • 78

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

    • 64
    • 81

    Mostly Cloudy

    • 68
    • 84

    Chance Rain Showers

    • 58
    • 80

    Chance Thunderstorms

Today 4 Sep Washington

Showers likely with a chance of Thunderstorms. Some Thunderstorms may be severe with heavy rainfall. Near steady temperature around 80. Northwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 4 Sep Washington

Mostly cloudy. A slight chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Warm with Lows in the upper 60s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

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Hillman State Park Temperature Statistics

September Temperature

Pittsburgh, Pittsburgh International Airport (7.5 miles)

  • Lowest 2 September, 2026

    71.1 °F

  • Average September

    81.4 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh, Pittsburgh International Airport (7.5 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    54.1 °F

  • Average High 2021–2026

    63.4 °F
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