Custer Weather Forecast

    • 53
    • 78

    Rain Showers Likely

    • 53
    • 73

    Rain Showers Likely

    • 50
    • 77

    Slight Chance Rain Showers

    • 49
    • 78

    Mostly Sunny

    • 49
    • 77

    Partly Sunny

    • 52
    • 78

    Partly Sunny

Today 15 Sep Northeastern Yellowstone

Increasing Clouds. Slight chance of rain Showers in the Morning, then chance of rain Showers in the afternoon. Isolated Thunderstorms late in the afternoon. Highs in the upper 70s. West Winds 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 15 Sep Northeastern Yellowstone

Scattered Thunderstorms and chance of rain Showers early in the Evening, then isolated Thunderstorms in the late evening and overnight. Rain Showers likely in the late evening and overnight. Lows in the mid 50s. West Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Custer Temperature Statistics

September Temperature

Billings, Billings Logan International Airport (52.2 miles)

  • Lowest 6 September, 2025

    44.1 °F

  • Average September

    68 °F

  • Highest 2 September, 2025

    91 °F

Climate (2020–Present)

Billings, Billings Logan International Airport (52.2 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    60.5 °F
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