Hillsbourough Weather Forecast

    • 69
    • 90

    Mostly Sunny

    • 73
    • 95

    Mostly Sunny

    • 69
    • 91

    Mostly Sunny

    • 67
    • 90

    Sunny

    • 68
    • 91

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

Today 13 Sep Cobb

Sunny. Highs around 90. Northwest Winds 5 to 10 Mph.

Tonight 13 Sep Cobb

Mostly clear. Lows in the upper 60s. Light northwest Winds.

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Hillsbourough Temperature Statistics

September Temperature

Fulton County Airport-Brown Field (2.5 miles)

  • Lowest 9 September, 2026

    66.7 °F

  • Average September

    81.7 °F

  • Highest 3 September, 2026

    98.7 °F

Climate (2021–2026)

Fulton County Airport-Brown Field (2.5 miles)

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  • Average Low 2021–2026

    53.3 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    74.8 °F
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