Portland Weather Forecast

    • 61
    • 84

    Chance Rain Showers

    • 60
    • 77

    Chance Thunderstorms

    • 60
    • 74

    Chance Rain Showers

    • 61
    • 77

    Chance Thunderstorms

    • 58
    • 77

    Chance Rain Showers

    • 55
    • 73

    Slight Chance Rain Showers

Today 18 Sep Monroe

Mostly cloudy this Morning, then becoming partly sunny. A slight chance of Showers. A slight chance of Thunderstorms this afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 18 Sep Monroe

Mostly cloudy with a chance of Showers. A chance of Thunderstorms in the Evening, then a slight chance of Thunderstorms after midnight. Lows around 60. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Portland Temperature Statistics

September Temperature

Viroqua Municipal Airport (13 miles)

  • Lowest 1 September, 2025

    50 °F

  • Average September

    66.2 °F

  • Highest 14 September, 2025

    83.5 °F

Climate (2020–Present)

Viroqua Municipal Airport (13 miles)

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

  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    55.4 °F
Get WillyWeather+ to remove ads