Lester Lake Weather Forecast

    • 40
    • 61

    Chance Rain Showers

    • 43
    • 66

    Mostly Sunny

    • 49
    • 73

    Slight Chance Thunderstorms

    • 48
    • 75

    Mostly Sunny

    • 50
    • 78

    Mostly Sunny

    • 51
    • 78

    Partly Sunny

Today 20 Sep Natrona County Lower Elevations

Mostly cloudy with Showers likely. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Highs in the lower 60s. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 60 percent.

Tonight 20 Sep Natrona County Lower Elevations

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 40. North Winds around 10 Mph with Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lester Lake Temperature Statistics

September Temperature

Casper, Natrona County International Airport (36.7 miles)

  • Lowest 9 September, 2026

    36.6 °F

  • Average September

    65.7 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Casper, Natrona County International Airport (36.7 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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