Sullivan Lake Weather Forecast

    • 48
    • 64

    Slight Chance Rain Showers

    • 43
    • 60

    Partly Sunny

    • 38
    • 54

    Chance Thunderstorms

    • 41
    • 56

    Slight Chance Thunderstorms

    • 44
    • 58

    Chance Rain Showers

    • 45
    • 59

    Rain Showers Likely

    • 46
    • 58

    Rain Showers Likely

Today 4 Jun Northeast Mountains

Partly cloudy with a 20 percent chance of rain Showers. Highs in the upper 60s to mid 70s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 4 Jun Northeast Mountains

Partly cloudy. Lows in the 40s. Gusts up to 20 Mph in the evening.

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Sullivan Lake Temperature Statistics

June Temperature

Boundary County Airport (45.4 miles)

  • Lowest 2 June, 2026

    48.2 °F

  • Average June

    56.2 °F

  • Highest 2 June, 2026

    69.8 °F

Climate (2021–Present)

Boundary County Airport (45.4 miles)

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  • Average Low 2021–2026

    37.9 °F

  • Average 2021–2026

    47.4 °F

  • Average High 2021–2026

    56.8 °F
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