Mercedes Weather Forecast

    • 64
    • 89

    Increasing Clouds

    • 67
    • 91

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

    • 67
    • 90

    Mostly Sunny

    • 64
    • 91

    Mostly Sunny

    • 62
    • 86

    Partly Sunny

Today 23 Mar Southern Hidalgo

Sunny. Highs around 90. Southeast Winds 10 to 15 Mph with Gusts up to 20 Mph.

Tonight 23 Mar Southern Hidalgo

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. East Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming southeast around 5 Mph after midnight.

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Mercedes Temperature Statistics

March Temperature

Harlingen, Rio Grande Valley International Airport (16.8 miles)

  • Lowest 17 March, 2026

    43.6 °F

  • Average March

    74.2 °F

  • Highest 11 March, 2026

    98.7 °F

Climate (2021–Present)

Harlingen, Rio Grande Valley International Airport (16.8 miles)

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  • Average Low 2021–2026

    65.7 °F

  • Average 2021–2026

    75.6 °F

  • Average High 2021–2026

    86.5 °F
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