Altona Weather Forecast

    • 63
    • 88

    Thunderstorms Likely

    • 63
    • 88

    Thunderstorms Likely

    • 63
    • 90

    Chance Thunderstorms

    • 63
    • 91

    Slight Chance Thunderstorms

    • 63
    • 91

    Mostly Sunny

    • 65
    • 96

    Slight Chance Thunderstorms

Today 28 Jul Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy in the Morning, then mostly cloudy with a chance of Thunderstorms early in the afternoon. Thunderstorms likely late in the afternoon. Highs near 90. Chance of precipitation 60 percent.

Tonight 28 Jul Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows 60 to 66. Chance of precipitation 50 percent.

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Altona Temperature Statistics

July Temperature

Vance Brand Airport (6.2 miles)

  • Lowest 1 July, 2026

    50.4 °F

  • Average July

    77 °F

  • Highest 20 July, 2026

    99.3 °F

Climate (2021–2026)

Vance Brand Airport (6.2 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    68.8 °F
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