Altona Weather Forecast

    • 51
    • 81

    Partly Sunny

    • 48
    • 74

    Rain Showers Likely

    • 46
    • 66

    Chance Thunderstorms

    • 46
    • 72

    Slight Chance Thunderstorms

    • 49
    • 74

    Partly Sunny

    • 53
    • 77

    Slight Chance Thunderstorms

Today 15 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Highs in the lower 80s.

Tonight 15 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Lows near 50.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Altona Temperature Statistics

September Temperature

Vance Brand Airport (6.2 miles)

  • Lowest 6 September, 2025

    43.7 °F

  • Average September

    69.7 °F

  • Highest 10 September, 2025

    93.2 °F

Climate (2020–Present)

Vance Brand Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    67.9 °F
Get WillyWeather+ to remove ads