Johnston, Iowa | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Mostly Clear
    56°
    Saturday 5/11
    Forecast night icon
    56°
    Mostly Clear
    Hourly
    Night Details
    Mostly clear. Lows in the mid 50s. Southwest winds 5 to 10 mph.
  • Forecast day icon
    Sunday
    30% Chance of Storms
    83°
    Forecast night icon
    Night
    50% Chance of Storms
    61°
    Sunday 5/12
    Day
    83°
    30% Chance of Storms
    Forecast day icon
    Night
    61°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Southwest winds 10 to 15 mph. Chance of rain 30 percent.
    Night Details
    Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows in the upper 50s. Southwest winds 10 to 15 mph. Chance of rain 50 percent.
  • Forecast day icon
    Monday
    70% Chance of Storms
    69°
    Forecast night icon
    Night
    Mostly Cloudy
    52°
    Monday 5/13
    Day
    69°
    70% Chance of Storms
    Forecast day icon
    Night
    52°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Showers likely with a chance of thunderstorms. Highs around 70. Northeast winds 5 to 10 mph. Chance of rain 70 percent.
    Night Details
    Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    72°
    Forecast night icon
    Night
    Mostly Clear
    53°
    Tuesday 5/14
    Day
    72°
    Mostly Sunny
    Forecast day icon
    Night
    53°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the lower 70s.
    Night Details
    Mostly clear. Lows in the lower 50s.
  • Forecast day icon
    Wednesday
    40% Chance Rain Showers
    71°
    Forecast night icon
    Night
    50% Chance of Storms
    58°
    Wednesday 5/15
    Day
    71°
    40% Chance Rain Showers
    Forecast day icon
    Night
    58°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 40 percent.
    Night Details
    Mostly cloudy with a chance of showers. A chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 50 percent.
  • Forecast day icon
    Thursday
    50% Chance of Storms
    74°
    Forecast night icon
    Night
    40% Chance of Storms
    58°
    Thursday 5/16
    Day
    74°
    50% Chance of Storms
    Forecast day icon
    Night
    58°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming partly sunny. A chance of showers and thunderstorms. Highs in the lower 70s. Chance of rain 50 percent.
    Night Details
    Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 40 percent.
  • Forecast day icon
    Friday
    30% Chance of Storms
    84°
    Forecast night icon
    Night
    Partly Cloudy
    56°
    Friday 5/17
    Day
    84°
    30% Chance of Storms
    Forecast day icon
    Night
    56°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.
    Night Details
    Partly cloudy in the evening then becoming mostly clear. Lows in the upper 50s.
  • Forecast day icon
    Saturday
    Sunny
    81°
    Forecast night icon
    Night
    30% Chance of Rain
    58°
    Saturday 5/18
    Day
    81°
    Sunny
    Forecast day icon
    Night
    58°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny. Highs in the lower 80s.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 58F. Dew point will be around 50F with an average humidity of 59%. Winds will be 5 mph from the W.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    78°
    Forecast night icon
    Night
    40% Chance of Rain
    57°
    Sunday 5/19
    Day
    78°
    30% Chance of Rain
    Forecast day icon
    Night
    57°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 78F. Dew point will be around 49F with an average humidity of 48%. Winds will be 5 mph from the W.
    Night Details
    Clear with a chance of rain. Chance of precipitation 40%. Low temperature around 57F. Dew point will be around 50F with an average humidity of 60%. Winds will be 2 mph from the S.
  • Forecast day icon
    Monday
    50% Chance of Rain
    78°
    Forecast night icon
    Night
    50% Chance of Rain
    59°
    Monday 5/20
    Day
    78°
    50% Chance of Rain
    Forecast day icon
    Night
    59°
    50% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny with a chance of rain. Chance of precipitation 45%. High temperature around 78F. Dew point will be around 52F with an average humidity of 54%. Winds will be 5 mph from the S.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 45%. Low temperature around 59F. Dew point will be around 53F with an average humidity of 63%. Winds will be 4 mph from the S.