Norwalk Weather Forecast

    • 57
    • 76

    Rain Showers

    • 41
    • 66

    Isolated Thunderstorms

    • 38
    • 62

    Partly Sunny

    • 43
    • 65

    Mostly Cloudy

    • 48
    • 69

    Mostly Cloudy

    • 52
    • 74

    Slight Chance Thunderstorms

Today 18 May Monroe

Mostly cloudy with a chance of Showers and Thunderstorms. Warmer with Highs in the upper 70s. Southwest Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 18 May Monroe

Showers with a chance of Thunderstorms. Lows in the lower 50s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Norwalk Temperature Statistics

May Temperature

Sparta, Sparta / Fort McCoy Airport (9.9 miles)

  • Lowest 6 May, 2026

    25.5 °F

  • Average May

    51.1 °F

  • Highest 15 May, 2026

    84.9 °F

Climate (2021–Present)

Sparta, Sparta / Fort McCoy Airport (9.9 miles)

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  • Average Low 2021–2026

    34.9 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    58.3 °F
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