Sibley Lake Weather Forecast

    • 47
    • 73

    Slight Chance Thunderstorms

    • 45
    • 69

    Mostly Sunny

    • 48
    • 74

    Mostly Sunny

    • 45
    • 74

    Mostly Cloudy

    • 41
    • 65

    Chance Rain Showers

    • 39
    • 59

    Chance Rain Showers

Today 4 Aug Northeast Bighorn Mountains

Mostly sunny. Warmer. Highs in the mid 70s. Southeast Winds 5 to 15 Mph.

Tonight 4 Aug Northeast Bighorn Mountains

Mostly cloudy with a 20 percent chance of Showers and Thunderstorms in the Evening, then mostly clear overnight. Lows in the upper 40s. East Winds 5 to 15 Mph in the evening shifting to the southwest overnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sibley Lake Temperature Statistics

August Temperature

Sheridan County Airport (22.4 miles)

  • Lowest 1 August, 2025

    57.9 °F

  • Average August

    69 °F

  • Highest 1 August, 2025

    84.9 °F

Climate (2020–Present)

Sheridan County Airport (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    61.5 °F
Get WillyWeather+ to remove ads