Tern Lake Weather Forecast

    • 34
    • 66

    Mostly Sunny

    • 35
    • 66

    Partly Sunny

    • 36
    • 65

    Mostly Sunny

    • 31
    • 59

    Chance Rain Showers

    • 30
    • 56

    Mostly Sunny

    • 33
    • 65

    Mostly Sunny

Today 18 Sep Yellowstone National Park

Mostly sunny. Highs in the mid 60s. West Winds around 10 Mph in the afternoon.

Tonight 18 Sep Yellowstone National Park

Mostly clear. Near steady temperature in the mid 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tern Lake Temperature Statistics

September Temperature

Yellowstone Lake (11.2 miles)

  • Lowest 6 September, 2025

    30.9 °F

  • Average September

    50.4 °F

  • Highest 3 September, 2025

    75.9 °F

Climate (2020–Present)

Yellowstone Lake (11.2 miles)

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  • Average Low 2020–2025

    22.3 °F

  • Average 2020–2025

    35.2 °F

  • Average High 2020–2025

    48 °F
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