Longmont Weather Forecast

    • 63
    • 93

    Rain Showers Likely

    • 59
    • 86

    Rain Showers Likely

    • 58
    • 86

    Thunderstorms Likely

    • 59
    • 92

    Mostly Sunny

    • 61
    • 96

    Mostly Sunny

    • 63
    • 98

    Hot

    • 64
    • 99

    Slight Chance Thunderstorms

Today 22 Jul Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Partly cloudy in the Morning, then mostly cloudy with a chance of Thunderstorms early in the afternoon. Showers likely and chance of Thunderstorms late in the afternoon. Highs near 90. Chance of rain 60 percent.

Tonight 22 Jul Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Chance of Thunderstorms in the evening. Lows in the lower 60s. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Longmont Temperature Statistics

July Temperature

Vance Brand Airport (3.1 miles)

  • Lowest 2 July, 2025

    54.1 °F

  • Average July

    76.4 °F

  • Highest 9 July, 2025

    103.6 °F

Climate (2020–Present)

Vance Brand Airport (3.1 miles)

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  • Average Low 2020–2025

    37.7 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    67.8 °F
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