Monongahela Weather Forecast

    • 53
    • 71

    Mostly Cloudy

    • 57
    • 71

    Slight Chance Rain Showers

    • 57
    • 69

    Mostly Cloudy

    • 54
    • 73

    Areas Fog

    • 59
    • 75

    Mostly Cloudy

    • 61
    • 76

    Chance Rain Showers

Today 26 Sep Washington

Mostly sunny. Near steady temperature in the upper 60s. North Winds 10 to 15 Mph.

Tonight 26 Sep Washington

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 50s. North Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monongahela Temperature Statistics

September Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 24 September, 2026

    48.9 °F

  • Average September

    69.3 °F

  • Highest 2 September, 2026

    91 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (9.9 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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