Brentwood Weather Forecast

    • 34
    • 46

    Decreasing Clouds

    • 45
    • 53

    Rain Showers

    • 49
    • 63

    Rain Showers

    • 32
    • 59

    Rain Showers

    • 24
    • 36

    Chance Snow

    • 27
    • 36

    Partly Sunny

    • 31
    • 41

    Mostly Cloudy

Today 7 Jan Allegheny

Considerable cloudiness. Near steady temperature in the mid 40s. West Winds 5 to 10 Mph.

Tonight 7 Jan Allegheny

Mostly cloudy. Lows in the mid 30s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brentwood Temperature Statistics

January Temperature

Pittsburgh - Allegheny County Airport (2.5 miles)

  • Lowest 3 January, 2026

    12 °F

  • Average January

    22.7 °F

  • Highest 5 January, 2026

    46.9 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (2.5 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    63.3 °F
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