Pathfinder Reservoir Weather Forecast

    • 46
    • 72

    Partly Sunny

    • 48
    • 72

    Mostly Cloudy

    • 49
    • 71

    Partly Sunny

    • 50
    • 75

    Mostly Sunny

    • 51
    • 75

    Chance Rain Showers

    • 43
    • 66

    Chance Rain Showers

    • 40
    • 58

    Partly Sunny

Today 23 Sep Green Mountains and Rattlesnake Range

Mostly sunny and breezy. Highs in the upper 60s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 23 Sep Green Mountains and Rattlesnake Range

Mostly clear. Lows in the mid 40s. Northwest Winds around 10 Mph in the evening.

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Pathfinder Reservoir Temperature Statistics

September Temperature

Casper, Natrona County International Airport (38.5 miles)

  • Lowest 9 September, 2026

    36.6 °F

  • Average September

    64.8 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Casper, Natrona County International Airport (38.5 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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