Altona Weather Forecast

    • 37
    • 45

    Chance Rain Showers

    • 38
    • 56

    Chance Thunderstorms

    • 43
    • 63

    Rain Showers Likely

    • 43
    • 63

    Chance Thunderstorms

    • 48
    • 72

    Chance Thunderstorms

    • 53
    • 79

    Partly Sunny

Today 19 May Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Patchy fog in the morning. Chance of rain Showers and slight chance of Thunderstorms in the afternoon. Highs near 50. Chance of rain 50 percent.

Tonight 19 May Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Cloudy with a slight chance of snow Showers. Chance of rain Showers after Midnight, then a slight chance of rain Showers towards Sunrise. Patchy fog through the night. Lows in the lower to mid 30s. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Altona Temperature Statistics

May Temperature

Vance Brand Airport (6.2 miles)

  • Lowest 1 May, 2026

    28.6 °F

  • Average May

    57.8 °F

  • Highest 14 May, 2026

    86.9 °F

Climate (2021–Present)

Vance Brand Airport (6.2 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    69 °F
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