Heidelberg Weather Forecast

    • 54
    • 74

    Increasing Clouds

    • 58
    • 82

    Partly Sunny

    • 63
    • 81

    Partly Sunny

    • 66
    • 84

    Partly Sunny

    • 65
    • 84

    Slight Chance Thunderstorms

    • 62
    • 80

    Chance Rain Showers

Today 9 Dec Southern Hidalgo

Mostly sunny. Highs in the mid 70s. North Winds around 5 Mph, becoming southeast this afternoon.

Tonight 9 Dec Southern Hidalgo

Partly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

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Heidelberg Temperature Statistics

December Temperature

Harlingen, Rio Grande Valley International Airport (13.7 miles)

  • Lowest 2 December, 2025

    48 °F

  • Average December

    59.7 °F

  • Highest 7 December, 2025

    86 °F

Climate (2020–Present)

Harlingen, Rio Grande Valley International Airport (13.7 miles)

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  • Average Low 2020–2025

    65.5 °F

  • Average 2020–2025

    75.4 °F

  • Average High 2020–2025

    86.2 °F
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