Neff Reservoir Weather Forecast

    • 52
    • 73

    Increasing Clouds

    • 49
    • 79

    Partly Sunny

    • 54
    • 77

    Mostly Cloudy

    • 47
    • 80

    Chance Rain Showers

    • 45
    • 72

    Chance Rain Showers

    • 46
    • 77

    Slight Chance Thunderstorms

Today 15 Sep Natrona County Lower Elevations

Sunny in the Morning, then becoming partly cloudy. Highs in the lower 70s. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 15 Sep Natrona County Lower Elevations

Clear. Lows around 40. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • 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

    67.5 °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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