Longmont Weather Forecast

    • 56
    • 94

    Slight Chance Thunderstorms

    • 58
    • 94

    Partly Sunny

    • 53
    • 81

    Chance Thunderstorms

    • 56
    • 86

    Mostly Sunny

    • 60
    • 95

    Mostly Sunny

    • 62
    • 100

    Hot

    • 62
    • 98

    Hot

Today 15 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy. Slight chance of Thunderstorms in the afternoon. Highs in the lower to mid 90s. Chance of precipitation 20 percent.

Tonight 15 Jun Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly clear. Lows in the mid to upper 50s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Longmont Temperature Statistics

June Temperature

Vance Brand Airport (3.1 miles)

  • Lowest 7 June, 2025

    44.1 °F

  • Average June

    65.9 °F

  • Highest 10 June, 2025

    93.2 °F

Climate (2020–Present)

Vance Brand Airport (3.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    37.7 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    67.8 °F
Get WillyWeather+ to remove ads