Monongahela Weather Forecast

    • 65
    • 78

    Rain Showers

    • 65
    • 84

    Chance Thunderstorms

    • 70
    • 89

    Partly Sunny

    • 74
    • 93

    Mostly Sunny

    • 75
    • 95

    Mostly Sunny

    • 75
    • 97

    Slight Chance Thunderstorms

Today 27 Jun Washington

Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Humid with Highs in the mid 70s. Southeast Winds around 5 Mph. Chance of rain 90 percent.

Tonight 27 Jun Washington

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Patchy fog after midnight. Humid with Lows in the mid 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

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Monongahela Temperature Statistics

June Temperature

Pittsburgh - Allegheny County Airport (9.9 miles)

  • Lowest 16 June, 2026

    50 °F

  • Average June

    69.5 °F

  • Highest 11 June, 2026

    88 °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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