Norwalk Weather Forecast

    • 66
    • 87

    Slight Chance Thunderstorms

    • 60
    • 84

    Partly Sunny

    • 59
    • 81

    Mostly Cloudy

    • 63
    • 81

    Rain Showers Likely

    • 67
    • 83

    Rain Showers Likely

    • 61
    • 84

    Chance Rain Showers

Today 4 Sep Monroe

Mostly sunny. Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Heat index Values in the mid 90s.

Tonight 4 Sep Monroe

Partly cloudy in the Evening, then becoming mostly cloudy. Areas of fog after midnight. Humid with Lows in the mid 60s. Light Winds, becoming northeast after midnight. Heat index Values in the mid 90s early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Norwalk Temperature Statistics

September Temperature

Sparta, Sparta / Fort McCoy Airport (9.9 miles)

  • Lowest 2 September, 2026

    65.3 °F

  • Average September

    75.9 °F

  • Highest 1 September, 2026

    91 °F

Climate (2021–2026)

Sparta, Sparta / Fort McCoy Airport (9.9 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    58.4 °F
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