San Joaquin River National Wildlife Refuge Weather Forecast

    • 67
    • 96

    Increasing Clouds

    • 66
    • 86

    Chance Rain Showers

    • 62
    • 83

    Chance Rain Showers

    • 61
    • 88

    Mostly Sunny

    • 64
    • 89

    Mostly Sunny

    • 66
    • 94

    Chance Rain Showers

    • 60
    • 83

    Chance Rain Showers

Today 17 Sep Northern San Joaquin Valley

Sunny. Highs 92 to 99. Northwest Winds up to 15 Mph.

Tonight 17 Sep Northern San Joaquin Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows 64 to 72. Northwest Winds up to 10 Mph with Gusts to around 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin River National Wildlife Refuge Temperature Statistics

September Temperature

Modesto City-County Airport - Harry Sham Field (13 miles)

  • Lowest 5 September, 2025

    61 °F

  • Average September

    74.9 °F

  • Highest 2 September, 2025

    102 °F

Climate (2020–Present)

Modesto City-County Airport - Harry Sham Field (13 miles)

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  • Average Low 2020–2025

    51.2 °F

  • Average 2020–2025

    63.3 °F

  • Average High 2020–2025

    76.1 °F
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