New Castle Weather Forecast

    • 44
    • 79

    Chance Thunderstorms

    • 43
    • 74

    Slight Chance Thunderstorms

    • 44
    • 74

    Mostly Sunny

    • 48
    • 78

    Partly Sunny

    • 47
    • 77

    Slight Chance Thunderstorms

    • 45
    • 76

    Slight Chance Thunderstorms

Today 16 Sep Debeque to Silt Corridor

Sunny late in the Morning, then partly sunny with scattered Showers and Thunderstorms in the afternoon. Highs 75 to 85. West Winds 10 to 15 Mph with Gusts up to 25 Mph in the afternoon. Chance of rain 30 percent.

Tonight 16 Sep Debeque to Silt Corridor

Mostly cloudy with scattered Showers and isolated Thunderstorms in the Evening, then mostly clear after midnight. Lows 35 to 45. North Winds 10 to 15 Mph with Gusts up to 20 Mph in the Evening, becoming light. Chance of rain 30 percent.

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New Castle Temperature Statistics

September Temperature

Garfield County Regional Airport (9.9 miles)

  • Lowest 14 September, 2025

    41 °F

  • Average September

    66.4 °F

  • Highest 3 September, 2025

    91 °F

Climate (2020–Present)

Garfield County Regional Airport (9.9 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    49.5 °F

  • Average High 2020–2025

    64.2 °F
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