Modesto Reservoir Weather Forecast

    • 58
    • 88

    Increasing Clouds

    • 58
    • 85

    Mostly Cloudy

    • 58
    • 86

    Mostly Sunny

    • 59
    • 88

    Sunny

    • 62
    • 93

    Mostly Sunny

    • 63
    • 96

    Hot

Today 19 Sep Central Stanislaus County Including Modesto Metro

Sunny. Highs around 88. Northwest Winds up to 10 Mph.

Tonight 19 Sep Central Stanislaus County Including Modesto Metro

Clear in the evening then becoming mostly cloudy. Lows around 59. Light Winds.

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  • Temperature Real-Time

Modesto Reservoir Temperature Statistics

September Temperature

Modesto City-County Airport - Harry Sham Field (16.2 miles)

  • Lowest 1 September, 2026

    54.6 °F

  • Average September

    75 °F

  • Highest 10 September, 2026

    105.7 °F

Climate (2021–2026)

Modesto City-County Airport - Harry Sham Field (16.2 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    76.3 °F
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