Prosper Weather Forecast

    • 64
    • 82

    Slight Chance Thunderstorms

    • 62
    • 82

    Partly Sunny

    • 61
    • 81

    Chance Thunderstorms

    • 60
    • 79

    Chance Thunderstorms

    • 56
    • 73

    Chance Rain Showers

    • 57
    • 71

    Slight Chance Thunderstorms

Today 15 Sep Fillmore

Mostly cloudy this Morning, then partly sunny with a slight chance of Showers and Thunderstorms this afternoon. Highs in the mid 80s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 Sep Fillmore

Mostly cloudy. A slight chance of Showers and Thunderstorms in the evening. Humid with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Prosper Temperature Statistics

September Temperature

Decorah (16.8 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    60.8 °F

  • Highest 12 September, 2025

    82.4 °F

Climate (2020–Present)

Decorah (16.8 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    56.4 °F
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