Derby Weather Forecast

    • 40
    • 60

    Slight Chance Rain Showers

    • 46
    • 59

    Mostly Cloudy

    • 56
    • 65

    Mostly Cloudy

    • 57
    • 77

    Partly Sunny

    • 56
    • 84

    Mostly Sunny

    • 58
    • 78

    Partly Sunny

Today 14 Dec Frio

Mostly cloudy. A slight chance of Showers in the morning. Patchy fog in the morning. Much cooler. Less humid with Highs around 60. Northeast Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

Tonight 14 Dec Frio

Mostly cloudy in the Evening, then becoming partly cloudy. Much cooler with Lows around 40. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Derby Temperature Statistics

December Temperature

Cotulla, Cotulla-La Salle County Airport (21.7 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    56.2 °F

  • Highest 7 December, 2025

    84 °F

Climate (2020–Present)

Cotulla, Cotulla-La Salle County Airport (21.7 miles)

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  • Average Low 2020–2025

    64.5 °F

  • Average 2020–2025

    75.8 °F

  • Average High 2020–2025

    88.1 °F
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