Lake Koshkonong Weather Forecast

    • 58
    • 73

    Rain Showers

    • 60
    • 79

    Partly Sunny

    • 64
    • 81

    Chance Rain Showers

    • 63
    • 81

    Chance Thunderstorms

    • 65
    • 82

    Rain Showers Likely

    • 63
    • 81

    Chance Thunderstorms

Today 5 Aug Jefferson

Cooler, cloudy. Patchy fog in the morning. Numerous Showers in the morning. Slight chance of Thunderstorms through the day. Scattered Showers in the afternoon. Highs in the lower 70s. Northwest Winds up to 5 Mph. Chance of precipitation 70 percent.

Tonight 5 Aug Jefferson

Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. Isolated rain Showers in the evening. Patchy fog in the late evening and overnight. Lows in the upper 50s. Northwest Winds up to 5 Mph through around midnight becoming calm. Chance of Showers 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Koshkonong Temperature Statistics

August Temperature

Watertown (20.5 miles)

  • Lowest 2 August, 2026

    59.9 °F

  • Average August

    67.2 °F

  • Highest 2 August, 2026

    78.6 °F

Climate (2021–2026)

Watertown (20.5 miles)

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

  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    53.9 °F
Get WillyWeather+ to remove ads