Diamond Lake Weather Forecast

    • 41
    • 64

    Mostly Sunny

    • 37
    • 57

    Rain

    • 36
    • 48

    Chance Rain

    • 39
    • 62

    Sunny

    • 41
    • 65

    Mostly Sunny

    • 44
    • 69

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

Today 11 Sep South Central Oregon Cascades

Partly cloudy early this morning then becoming sunny. Highs in the lower 60s to lower 70s. Southwest Winds 10 to 15 Mph.

Tonight 11 Sep South Central Oregon Cascades

Mostly clear. Lows in the mid 30s to lower 40s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Lake Temperature Statistics

September Temperature

Roseburg Regional Airport (60.9 miles)

  • Lowest 8 September, 2026

    49.6 °F

  • Average September

    63.7 °F

  • Highest 9 September, 2026

    91.9 °F

Climate (2021–2026)

Roseburg Regional Airport (60.9 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    57 °F

  • Average High 2021–2026

    67.9 °F
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