Johnstown Weather Forecast

    • 47
    • 79

    Slight Chance Thunderstorms

    • 52
    • 86

    Slight Chance Thunderstorms

    • 51
    • 76

    Rain Showers Likely

    • 47
    • 66

    Rain Showers Likely

    • 45
    • 70

    Chance Thunderstorms

    • 48
    • 76

    Chance Thunderstorms

Today 22 May Central and South Weld County

Mostly sunny. Highs in the upper 70s. Southeast Winds 10 to 15 Mph with Gusts up to 30 Mph in the afternoon.

Tonight 22 May Central and South Weld County

Mostly clear. Slight chance of Thunderstorms in the evening. Lows in the upper 40s. Southeast Winds 10 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

May Temperature

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

  • Lowest 2 May, 2025

    36 °F

  • Average May

    57.2 °F

  • Highest 13 May, 2025

    87.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    37.6 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    65.1 °F
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