Johnstown Weather Forecast

    • 45
    • 86

    Mostly Sunny

    • 43
    • 87

    Mostly Sunny

    • 44
    • 91

    Partly Sunny

    • 36
    • 66

    Partly Sunny

    • 45
    • 75

    Partly Sunny

    • 45
    • 81

    Partly Sunny

Today 19 Mar Central and South Weld County

Sunny. Highs in the mid 80s. Northwest Winds 10 to 15 Mph in the afternoon.

Tonight 19 Mar Central and South Weld County

Mostly clear. Lows 38 to 46.

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Johnstown Temperature Statistics

March Temperature

Fort Collins/Loveland - Northern Colorado Regional Airport (9.3 miles)

  • Lowest 16 March, 2026

    18 °F

  • Average March

    45.8 °F

  • Highest 8 March, 2026

    73 °F

Climate (2021–Present)

Fort Collins/Loveland - Northern Colorado Regional Airport (9.3 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    65.8 °F
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