Longmont Weather Forecast

    • 57
    • 85

    Increasing Clouds

    • 57
    • 93

    Slight Chance Thunderstorms

    • 54
    • 91

    Chance Thunderstorms

    • 55
    • 87

    Slight Chance Thunderstorms

    • 55
    • 80

    Slight Chance Thunderstorms

    • 56
    • 86

    Chance Thunderstorms

    • 56
    • 88

    Slight Chance Thunderstorms

Today 19 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly sunny. Highs 79 to 85. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 19 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear in the Evening, then becoming mostly cloudy. Lows 53 to 59. East Winds 10 to 15 Mph in the Evening, becoming light.

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Longmont Temperature Statistics

June Temperature

Vance Brand Airport (3.1 miles)

  • Lowest 12 June, 2026

    43.9 °F

  • Average June

    68.8 °F

  • Highest 6 June, 2026

    93.7 °F

Climate (2021–2026)

Vance Brand Airport (3.1 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    68.8 °F
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