Johnstown, Colorado | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    40°
    Saturday 5/4
    Forecast night icon
    40°
    Partly Cloudy
    Hourly
    Night Details
    Partly cloudy. Lows around 40. Southeast winds 10 to 20 mph with gusts up to 25 mph.
  • Forecast day icon
    Sunday
    Windy
    73°
    Forecast night icon
    Night
    Windy
    49°
    Sunday 5/5
    Day
    73°
    Windy
    Forecast day icon
    Night
    49°
    Windy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy in the morning then mostly cloudy with a slight chance of thunderstorms in the afternoon. Windy. Highs in the upper 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph increasing to south 20 to 30 mph with gusts up to 45 mph in the afternoon. Chance of precipitation 10 percent.
    Night Details
    Mostly cloudy in the evening then becoming partly cloudy. A 20 percent chance of thunderstorms. Windy. Lows in the upper 40s. South winds 20 to 30 mph with gusts up to 45 mph.
  • Forecast day icon
    Monday
    Windy
    57°
    Forecast night icon
    Night
    Partly Cloudy
    40°
    Monday 5/6
    Day
    57°
    Windy
    Forecast day icon
    Night
    40°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a 20 percent chance of showers. Very windy. Cooler. Highs in the lower 60s. West winds 25 to 35 mph with gusts up to 55 mph.
    Night Details
    Partly cloudy. Lows near 40. West winds 20 to 25 mph with gusts up to 55 mph.
  • Forecast day icon
    Tuesday
    Windy
    61°
    Forecast night icon
    Night
    Partly Cloudy
    35°
    Tuesday 5/7
    Day
    61°
    Windy
    Forecast day icon
    Night
    35°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a 10 percent chance of thunderstorms. Windy. Highs in the lower 60s.
    Night Details
    Partly cloudy. Lows in the mid 30s.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    57°
    Forecast night icon
    Night
    Partly Cloudy
    35°
    Wednesday 5/8
    Day
    57°
    Partly Cloudy
    Forecast day icon
    Night
    35°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a 10 percent chance of thunderstorms. Highs in the lower 60s.
    Night Details
    Partly cloudy with a 20 percent chance of rain showers. Lows in the upper 30s.
  • Forecast day icon
    Thursday
    50% Chance of Storms
    57°
    Forecast night icon
    Night
    40% Chance of Storms
    36°
    Thursday 5/9
    Day
    57°
    50% Chance of Storms
    Forecast day icon
    Night
    36°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of rain showers and slight chance of thunderstorms. Highs around 60. Chance of rain 50 percent.
    Night Details
    Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows near 40. Chance of rain 40 percent.
  • Forecast day icon
    Friday
    50% Chance of Storms
    57°
    Forecast night icon
    Night
    30% Chance of Storms
    41°
    Friday 5/10
    Day
    57°
    50% Chance of Storms
    Forecast day icon
    Night
    41°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of showers and slight chance of thunderstorms. Highs in the upper 50s. Chance of rain 50 percent.
    Night Details
    Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows near 40. Highs in the mid 60s. Chance of rain 30 percent.
  • Forecast day icon
    Saturday
    30% Chance of Storms
    65°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Saturday 5/11
    Day
    65°
    30% Chance of Storms
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly cloudy with a chance of showers and slight chance of thunderstorms. Lows near 40. Highs in the mid 60s. Chance of rain 30 percent.
    Night Details
    Partly cloudy. Low temperature around 46F. Dew point will be around 37F with an average humidity of 56%. Winds will be 2 mph from the W.
  • Forecast day icon
    Sunday
    Mostly Sunny
    70°
    Forecast night icon
    Night
    30% Chance of Rain
    49°
    Sunday 5/12
    Day
    70°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 70F. Dew point will be around 37F with an average humidity of 40%. Winds will be 2 mph from the W.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 49F. Dew point will be around 37F with an average humidity of 48%. Winds will be 4 mph from the W.
  • Forecast day icon
    Monday
    Partly Cloudy
    72°
    Forecast night icon
    Night
    30% Chance of Rain
    50°
    Monday 5/13
    Day
    72°
    Partly Cloudy
    Forecast day icon
    Night
    50°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 72F. Dew point will be around 38F with an average humidity of 38%. Winds will be 2 mph from the W.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 50F. Dew point will be around 39F with an average humidity of 51%. Winds will be 4 mph from the W.