Diamond Mountain Weather Forecast

    • 44
    • 59

    Slight Chance Thunderstorms

    • 50
    • 61

    Partly Cloudy

    • 46
    • 65

    Slight Chance Thunderstorms

    • 45
    • 63

    Mostly Sunny

    • 46
    • 66

    Mostly Sunny

    • 49
    • 69

    Mostly Sunny

    • 51
    • 68

    Chance Rain Showers

Today 13 Sep Lower Yampa River Basin

Mostly cloudy. Scattered Showers and isolated Thunderstorms early in the Morning, then numerous Showers and scattered Thunderstorms in the afternoon. Some Thunderstorms may be severe early in the morning. Highs in the 60s. Southwest Winds 10 to 15 Mph in the afternoon. Chance of rain 60 percent.

Tonight 13 Sep Lower Yampa River Basin

Mostly cloudy with a chance of Showers and Thunderstorms Early, then mostly cloudy with a slight chance of Showers and Thunderstorms in the evening. Mostly clear after midnight. Lows in the 40s. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Mountain Temperature Statistics

September Temperature

Vernal Airport (35.4 miles)

  • Lowest 7 September, 2025

    51.1 °F

  • Average September

    70.3 °F

  • Highest 2 September, 2025

    90 °F

Climate (2020–Present)

Vernal Airport (35.4 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    49 °F

  • Average High 2020–2025

    61.5 °F
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