Caswell Memorial State Park Weather Forecast

    • 54
    • 56

    Rain Showers Likely

    • 56
    • 56

    Rain Showers

    • 56
    • 58

    Rain Showers

    • 52
    • 56

    Rain Showers Likely

    • 50
    • 56

    Rain Showers

    • 51
    • 54

    Rain Showers

    • 48
    • 54

    Rain Showers

Today 19 Dec Northern San Joaquin Valley

Mostly cloudy. A chance of rain Showers late in the afternoon. Highs around 57. Southeast Winds up to 10 Mph.

Tonight 19 Dec Northern San Joaquin Valley

A chance of rain Showers early in the Evening, then rain Showers in the late evening and overnight. Lows 50 to 56. Southeast Winds up to 10 Mph.

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  • Temperature Real-Time

Caswell Memorial State Park Temperature Statistics

December Temperature

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

  • Lowest 4 December, 2025

    36 °F

  • Average December

    43.4 °F

  • Highest 17 December, 2025

    62.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    51.4 °F

  • Average 2020–2025

    63.3 °F

  • Average High 2020–2025

    75.9 °F
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