Alto Weather Forecast

    • 66
    • 83

    Chance Thunderstorms

    • 56
    • 79

    Partly Sunny

    • 58
    • 79

    Partly Sunny

    • 61
    • 79

    Mostly Cloudy

    • 66
    • 80

    Rain Showers Likely

    • 61
    • 83

    Slight Chance Rain Showers

Today 4 Sep Fond Du Lac

Warm and humid. Cloudy late in the morning then becoming partly sunny. Isolated Showers late in the morning. Highs in the mid 80s. Southwest Winds 5 to 10 Mph shifting to the west in the afternoon. Chance of Showers 20 percent. Highest heat index Readings 95 to 96 in the afternoon.

Tonight 4 Sep Fond Du Lac

Partly cloudy until early morning then becoming mostly cloudy. Scattered Showers and Thunderstorms through around Midnight, then slight chance of light Showers after midnight. Patchy fog in the late evening and overnight. Lows in the upper 60s. Northeast Winds up to 10 Mph. Chance of precipitation 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Alto Temperature Statistics

September Temperature

Fond Du Lac County Airport (16.2 miles)

  • Lowest 2 September, 2026

    68 °F

  • Average September

    78.4 °F

  • Highest 1 September, 2026

    90.6 °F

Climate (2021–2026)

Fond Du Lac County Airport (16.2 miles)

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

  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    49 °F

  • Average High 2021–2026

    58.3 °F
Get WillyWeather+ to remove ads