Tarentum Weather Forecast

    • 57
    • 83

    Rain Showers Likely

    • 50
    • 72

    Mostly Sunny

    • 62
    • 82

    Mostly Sunny

    • 65
    • 85

    Chance Thunderstorms

    • 66
    • 85

    Rain Showers Likely

    • 61
    • 82

    Chance Rain Showers

Today 13 Sep Allegheny

Patchy fog this morning. Mostly cloudy with a chance of Showers this Morning, then partly sunny this afternoon. Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 13 Sep Allegheny

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Humid with Lows in the upper 50s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Tarentum Temperature Statistics

September Temperature

Butler, Butler County Airport/K W Scholter Field (15.5 miles)

  • Lowest 6 September, 2026

    55.4 °F

  • Average September

    72.8 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

Butler, Butler County Airport/K W Scholter Field (15.5 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    60.6 °F
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