Roundup Lake Weather Forecast

    • 65
    • 95

    Mostly Sunny

    • 68
    • 99

    Hot

    • 68
    • 102

    Slight Chance Thunderstorms

    • 64
    • 91

    Chance Thunderstorms

    • 63
    • 91

    Rain Showers Likely

    • 62
    • 89

    Chance Thunderstorms

    • 64
    • 91

    Slight Chance Thunderstorms

Today 18 Jul Garden

Sunny. Highs in the mid 90s. Light and variable Winds, becoming east 10 to 15 Mph in the afternoon.

Tonight 18 Jul Garden

Clear. Lows in the mid 60s. Southeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Roundup Lake Temperature Statistics

July Temperature

Alliance, Alliance Municipal Airport (28.6 miles)

  • Lowest 10 July, 2026

    50.6 °F

  • Average July

    76.3 °F

  • Highest 6 July, 2026

    99.6 °F

Climate (2021–2026)

Alliance, Alliance Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    49.3 °F

  • Average High 2021–2026

    64.8 °F
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