Rainbow Lake Weather Forecast

    • 55
    • 78

    Slight Chance Thunderstorms

    • 53
    • 73

    Mostly Sunny

    • 53
    • 71

    Sunny

    • 54
    • 74

    Mostly Sunny

    • 56
    • 73

    Mostly Sunny

    • 58
    • 76

    Mostly Sunny

Today 25 Jul Butte/Blackfoot Region

Mostly sunny. Patchy smoke in the morning. A 20 percent chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce gusty Winds. Highs in the upper 80s to mid 90s. Southwest Winds 15 to 25 Mph with Gusts to around 35 Mph.

Tonight 25 Jul Butte/Blackfoot Region

Partly cloudy. Patchy smoke through the night. A 20 percent chance of Showers and Thunderstorms in the evening. Some Thunderstorms may produce gusty Winds. Lows in the 50s. Southwest Winds 15 to 20 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Lake Temperature Statistics

July Temperature

Butte, Bert Mooney Airport (42.9 miles)

  • Lowest 2 July, 2026

    40.6 °F

  • Average July

    66.9 °F

  • Highest 11 July, 2026

    95.6 °F

Climate (2021–2026)

Butte, Bert Mooney Airport (42.9 miles)

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  • Average Low 2021–2026

    28.4 °F

  • Average 2021–2026

    42.2 °F

  • Average High 2021–2026

    55.6 °F
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