Neff Reservoir Weather Forecast

    • 51
    • 78

    Increasing Clouds

    • 48
    • 74

    Partly Sunny

    • 50
    • 74

    Mostly Cloudy

    • 52
    • 78

    Mostly Sunny

    • 48
    • 79

    Mostly Sunny

    • 49
    • 79

    Partly Sunny

Today 22 Sep Natrona County Lower Elevations

Mostly sunny. Highs in the mid 70s. Southwest Winds 10 to 15 Mph.

Tonight 22 Sep Natrona County Lower Elevations

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms in the evening. Breezy with Lows around 50. South Winds around 10 Mph, becoming southwest 15 to 20 Mph after midnight. Chance of rain 30 percent.

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  • Temperature Real-Time

Neff Reservoir Temperature Statistics

September Temperature

Casper, Natrona County International Airport (37.3 miles)

  • Lowest 9 September, 2026

    36.6 °F

  • Average September

    65.6 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Casper, Natrona County International Airport (37.3 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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