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.
Altona Temperature Statistics
September Temperature
Vance Brand Airport (6.2 miles)
Lowest 6 September, 2025
43.7 °FAverage September
69.7 °FHighest 10 September, 2025
93.2 °F
Climate (2020–Present)
Vance Brand Airport (6.2 miles)
Average Low 2020–2025
37.8 °FAverage 2020–2025
52.5 °FAverage High 2020–2025
67.9 °F