Altona Weather Forecast

    • 56
    • 86

    Slight Chance Thunderstorms

    • 57
    • 85

    Patchy Smoke

    • 60
    • 89

    Mostly Sunny

    • 62
    • 93

    Partly Sunny

    • 59
    • 88

    Partly Sunny

    • 60
    • 87

    Slight Chance Thunderstorms

Today 30 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Patchy smoke in the afternoon. Slight chance of Thunderstorms late in the afternoon. Highs 86 to 92. South Winds 15 to 25 Mph with Gusts up to 30 Mph. Chance of precipitation 20 percent.

Tonight 30 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy with a slight chance of Thunderstorms in the Evening, then mostly clear after midnight. Patchy smoke through the night. Lows 52 to 58. North Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light. Chance of precipitation 10 percent.

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Altona Temperature Statistics

June Temperature

Vance Brand Airport (6.2 miles)

  • Lowest 12 June, 2026

    43.9 °F

  • Average June

    69.2 °F

  • Highest 6 June, 2026

    93.7 °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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