Altoona Weather Forecast
- 64
- 81
Rain Showers Likely
- 64
- 78
Rain Showers
- 53
- 78
Mostly Sunny
- 56
- 78
Mostly Sunny
- 60
- 82
Chance Rain Showers
- 53
- 77
Chance Rain Showers
Today 7 Sep Eau Claire
Mostly sunny. Highs around 80. South Winds 5 to 15 Mph.
Tonight 7 Sep Eau Claire
Mostly cloudy. A 50 percent chance of Thunderstorms after midnight. Lows in the lower 60s. Southeast Winds 5 to 15 Mph.
Altoona Temperature Statistics
September Temperature
Chippewa Valley Regional Airport (4.3 miles)
Lowest 1 September, 2026
61.6 °FAverage September
74.9 °FHighest 1 September, 2026
89.7 °F
Climate (2021–2026)
Chippewa Valley Regional Airport (4.3 miles)
Average Low 2021–2026
36.9 °FAverage 2021–2026
47.1 °FAverage High 2021–2026
57.1 °F