Rainbow Lake Weather Forecast

    • 34
    • 45

    Rain/Snow

    • 33
    • 39

    Rain/Snow Likely

    • 34
    • 45

    Chance Rain/Snow

    • 36
    • 49

    Slight Chance Thunderstorms

    • 40
    • 55

    Chance Rain

    • 39
    • 52

    Chance Rain Showers

    • 43
    • 59

    Mostly Sunny

Today 30 May Butte/Blackfoot Region

Rain likely early in the Morning, then rain Showers likely and a slight chance of Thunderstorms in the late morning and afternoon. Chance of precipitation 90 percent. Cooler. Highs in the 50s. Northwest Winds to 15 Mph in the afternoon.

Tonight 30 May Butte/Blackfoot Region

Rain likely. Chance of rain near 100 percent. Lows in the mid 30s to lower 40s. Northwest Winds to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Lake Temperature Statistics

May Temperature

Butte, Bert Mooney Airport (42.9 miles)

  • Lowest 19 May, 2026

    19.7 °F

  • Average May

    49.3 °F

  • Highest 28 May, 2026

    82.9 °F

Climate (2021–Present)

Butte, Bert Mooney Airport (42.9 miles)

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  • Average Low 2021–2026

    28.5 °F

  • Average 2021–2026

    42.4 °F

  • Average High 2021–2026

    55.9 °F
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