Longmont Weather Forecast

    • 42
    • 71

    Rain Showers

    • 40
    • 62

    Chance Rain Showers

    • 39
    • 66

    Mostly Sunny

    • 44
    • 76

    Partly Sunny

    • 48
    • 76

    Chance Thunderstorms

    • 46
    • 72

    Rain Showers Likely

    • 45
    • 63

    Rain Showers Likely

Today 30 Apr Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Slight chance of Thunderstorms early in the Afternoon, then a chance of Thunderstorms late in the afternoon. Highs near 70. Chance of precipitation 50 percent.

Tonight 30 Apr Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Showers and slight chance of Thunderstorms in the Evening, then Showers likely after midnight. Lows in the lower 40s. North Winds 10 to 15 Mph in the Evening, becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Longmont Temperature Statistics

April Temperature

Vance Brand Airport (3.1 miles)

  • Lowest 6 April, 2025

    24.6 °F

  • Average April

    51.5 °F

  • Highest 12 April, 2025

    88.9 °F

Climate (2020–Present)

Vance Brand Airport (3.1 miles)

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  • Average Low 2020–2025

    37.6 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    67.8 °F
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