Diamond Lake Weather Forecast

    • 56
    • 75

    Mostly Cloudy

    • 58
    • 74

    Partly Sunny

    • 57
    • 73

    Rain Showers

    • 52
    • 67

    Slight Chance Rain Showers

    • 52
    • 68

    Chance Rain Showers

    • 49
    • 65

    Partly Sunny

Today 26 Sep Brown

Mostly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. Highs in the mid 70s. South Winds 10 to 15 Mph in the Morning, becoming light and variable.

Tonight 26 Sep Brown

Mostly clear in the Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Lake Temperature Statistics

September Temperature

Ainsworth Regional Airport (24.2 miles)

  • Lowest 22 September, 2026

    47.1 °F

  • Average September

    67.7 °F

  • Highest 11 September, 2026

    94.8 °F

Climate (2021–2026)

Ainsworth Regional Airport (24.2 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    62.5 °F
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