Thompson Weather Forecast

    • 62
    • 70

    Rain Showers

    • 55
    • 75

    Chance Rain Showers

    • 61
    • 68

    Rain Showers

    • 58
    • 73

    Chance Rain Showers

    • 60
    • 74

    Chance Rain Showers

    • 56
    • 72

    Chance Rain Showers

Today 14 Sep Washington

Mostly sunny until late Afternoon, then mostly cloudy with a 20 percent chance of light rain Showers late in the afternoon. Highs around 70. Southeast Winds up to 10 Mph increasing to 10 to 15 Mph with Gusts to around 30 Mph in the afternoon.

Tonight 14 Sep Washington

Warmer. Mostly cloudy. Chance of light Showers through around midnight. Chance of Thunderstorms in the late evening and overnight. Showers after midnight. Near steady temperature in the lower 60s. South Winds 15 to 20 Mph. Chance of precipitation 90 percent.

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Thompson Temperature Statistics

September Temperature

Waukesha County Airport (16.2 miles)

  • Lowest 6 September, 2026

    59 °F

  • Average September

    70.5 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Waukesha County Airport (16.2 miles)

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  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    56.7 °F
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