Longmont Weather Forecast

    • 39
    • 57

    Rain Showers Likely

    • 35
    • 60

    Rain Showers Likely

    • 40
    • 63

    Rain Showers Likely

    • 37
    • 53

    Rain Showers

    • 33
    • 55

    Chance Rain Showers

    • 40
    • 69

    Partly Sunny

    • 44
    • 74

    Chance Rain Showers

Today 27 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 52 to 58. Chance of precipitation 50 percent.

Tonight 27 Apr Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Rain Showers likely and slight chance of Thunderstorms in the Evening, then a chance of rain Showers after midnight. Lows in the mid to upper 30s. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Longmont Temperature Statistics

April Temperature

Vance Brand Airport (3.1 miles)

  • Lowest 4 April, 2026

    25.7 °F

  • Average April

    51.1 °F

  • Highest 11 April, 2026

    78.3 °F

Climate (2021–Present)

Vance Brand Airport (3.1 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    68.9 °F
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