Evansville Weather Forecast

    • 42
    • 73

    Rain Showers Likely

    • 38
    • 64

    Rain Showers Likely

    • 43
    • 70

    Mostly Sunny

    • 49
    • 77

    Partly Sunny

    • 48
    • 78

    Mostly Sunny

    • 50
    • 79

    Partly Sunny

Today 19 Sep Natrona County Lower Elevations

Partly cloudy. Patchy fog in the morning. A chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs around 70. West Winds around 10 Mph. Gusts up to 25 Mph in the afternoon. Chance of rain 30 percent.

Tonight 19 Sep Natrona County Lower Elevations

Showers likely. A chance of Thunderstorms, mainly in the evening. Some Thunderstorms may produce heavy rainfall in the evening. Lows in the lower 40s. Northwest Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

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Evansville Temperature Statistics

September Temperature

Casper, Natrona County International Airport (10.6 miles)

  • Lowest 9 September, 2026

    36.6 °F

  • Average September

    66.3 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Casper, Natrona County International Airport (10.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    61.6 °F
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