Bellevue Weather Forecast

    • 60
    • 76

    Patchy Fog

    • 63
    • 81

    Mostly Sunny

    • 62
    • 82

    Rain Showers

    • 57
    • 76

    Chance Thunderstorms

    • 56
    • 75

    Partly Sunny

    • 59
    • 79

    Partly Sunny

    • 64
    • 81

    Slight Chance Thunderstorms

Today 20 Aug Allegheny

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature around 70. Northeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 20 Aug Allegheny

Mainly clear. A slight chance of Showers this evening. Patchy fog after midnight. Lows in the upper 50s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bellevue Temperature Statistics

August Temperature

Pittsburgh, Pittsburgh International Airport (11.2 miles)

  • Lowest 4 August, 2026

    58.6 °F

  • Average August

    74.6 °F

  • Highest 4 August, 2026

    86.6 °F

Climate (2021–2026)

Pittsburgh, Pittsburgh International Airport (11.2 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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