Joliet Weather Forecast

    • 76
    • 91

    Slight Chance Thunderstorms

    • 79
    • 91

    Slight Chance Thunderstorms

    • 79
    • 93

    Chance Thunderstorms

    • 76
    • 92

    Chance Thunderstorms

    • 73
    • 86

    Rain Showers Likely

    • 71
    • 84

    Rain Showers Likely

Today 16 May Caldwell

Partly cloudy. Highs around 90. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 16 May Caldwell

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to around 10 Mph with Gusts up to 20 Mph after midnight.

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Joliet Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (13.7 miles)

  • Lowest 2 May, 2026

    50 °F

  • Average May

    70.9 °F

  • Highest 13 May, 2026

    90 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    82.3 °F
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